<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019f8f21-7b22-7f25-b1cb-330c5357d54d,g:a7d2bd0f-e3d2-49c7-a943-1b2009b6332b-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:stx="http://www.seagate.com/20260703" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.seagate.com/20260703">
  <xs:import namespace="http://fasb.org/srt/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/country/2026" schemaLocation="https://xbrl.sec.gov/country/2026/country-2026.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/cyd-af-sub/2026" schemaLocation="https://xbrl.sec.gov/cyd/2026/cyd-af-sub-2026.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2026" schemaLocation="https://xbrl.sec.gov/dei/2026/dei-2026.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/ecd/2026" schemaLocation="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="stx-20260703_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="stx-20260703_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="stx-20260703_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="stx-20260703_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="Cover" roleURI="http://www.seagate.com/role/Cover">
        <link:definition>0000001 - Document - Cover</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AuditInformation" roleURI="http://www.seagate.com/role/AuditInformation">
        <link:definition>0000002 - Document - Audit Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONSOLIDATEDBALANCESHEETS" roleURI="http://www.seagate.com/role/CONSOLIDATEDBALANCESHEETS">
        <link:definition>9952151 - Statement - CONSOLIDATED BALANCE SHEETS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONSOLIDATEDSTATEMENTSOFOPERATIONS" roleURI="http://www.seagate.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS">
        <link:definition>9952152 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONSOLIDATEDSTATEMENTSOFCASHFLOWS" roleURI="http://www.seagate.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS">
        <link:definition>9952153 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITY" roleURI="http://www.seagate.com/role/CONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITY">
        <link:definition>9952154 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITYParenthetical" roleURI="http://www.seagate.com/role/CONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITYParenthetical">
        <link:definition>9952155 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisofPresentationandSummaryofSignificantAccountingPolicies" roleURI="http://www.seagate.com/role/BasisofPresentationandSummaryofSignificantAccountingPolicies">
        <link:definition>9952156 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetInformation" roleURI="http://www.seagate.com/role/BalanceSheetInformation">
        <link:definition>9952157 - Disclosure - Balance Sheet Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandOtherIntangibleAssets" roleURI="http://www.seagate.com/role/GoodwillandOtherIntangibleAssets">
        <link:definition>9952158 - Disclosure - Goodwill and Other Intangible Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Debt" roleURI="http://www.seagate.com/role/Debt">
        <link:definition>9952159 - Disclosure - Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://www.seagate.com/role/IncomeTaxes">
        <link:definition>9952160 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesCodificationTopic842" roleURI="http://www.seagate.com/role/LeasesCodificationTopic842">
        <link:definition>9952161 - Disclosure - Leases, Codification Topic 842</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValue" roleURI="http://www.seagate.com/role/FairValue">
        <link:definition>9952162 - Disclosure - Fair Value</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareholdersEquity" roleURI="http://www.seagate.com/role/ShareholdersEquity">
        <link:definition>9952163 - Disclosure - Shareholders' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SharebasedCompensation" roleURI="http://www.seagate.com/role/SharebasedCompensation">
        <link:definition>9952164 - Disclosure - Share-based Compensation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Guarantees" roleURI="http://www.seagate.com/role/Guarantees">
        <link:definition>9952165 - Disclosure - Guarantees</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShare" roleURI="http://www.seagate.com/role/EarningsPerShare">
        <link:definition>9952166 - Disclosure - Earnings Per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LegalEnvironmentalandOtherContingencies" roleURI="http://www.seagate.com/role/LegalEnvironmentalandOtherContingencies">
        <link:definition>9952167 - Disclosure - Legal, Environmental and Other Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Commitments" roleURI="http://www.seagate.com/role/Commitments">
        <link:definition>9952168 - Disclosure - Commitments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BusinessSegmentandGeographicInformation" roleURI="http://www.seagate.com/role/BusinessSegmentandGeographicInformation">
        <link:definition>9952169 - Disclosure - Business Segment and Geographic Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Revenue" roleURI="http://www.seagate.com/role/Revenue">
        <link:definition>9952170 - Disclosure - Revenue</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Divesture" roleURI="http://www.seagate.com/role/Divesture">
        <link:definition>9952171 - Disclosure - Divesture</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEvents" roleURI="http://www.seagate.com/role/SubsequentEvents">
        <link:definition>9952172 - Disclosure - Subsequent Events</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies" roleURI="http://www.seagate.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies">
        <link:definition>9955511 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetInformationTables" roleURI="http://www.seagate.com/role/BalanceSheetInformationTables">
        <link:definition>9955512 - Disclosure - Balance Sheet Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtTables" roleURI="http://www.seagate.com/role/DebtTables">
        <link:definition>9955513 - Disclosure - Debt (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesTables" roleURI="http://www.seagate.com/role/IncomeTaxesTables">
        <link:definition>9955514 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesCodificationTopic842Tables" roleURI="http://www.seagate.com/role/LeasesCodificationTopic842Tables">
        <link:definition>9955515 - Disclosure - Leases, Codification Topic 842 (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueTables" roleURI="http://www.seagate.com/role/FairValueTables">
        <link:definition>9955516 - Disclosure - Fair Value (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SharebasedCompensationTables" roleURI="http://www.seagate.com/role/SharebasedCompensationTables">
        <link:definition>9955517 - Disclosure - Share-based Compensation (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GuaranteesTables" roleURI="http://www.seagate.com/role/GuaranteesTables">
        <link:definition>9955518 - Disclosure - Guarantees (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareTables" roleURI="http://www.seagate.com/role/EarningsPerShareTables">
        <link:definition>9955519 - Disclosure - Earnings Per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BusinessSegmentandGeographicInformationTables" roleURI="http://www.seagate.com/role/BusinessSegmentandGeographicInformationTables">
        <link:definition>9955520 - Disclosure - Business Segment and Geographic Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueTables" roleURI="http://www.seagate.com/role/RevenueTables">
        <link:definition>9955521 - Disclosure - Revenue (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails" roleURI="http://www.seagate.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails">
        <link:definition>9955522 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails_1" roleURI="http://www.seagate.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails_1">
        <link:definition>9955522 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails_2" roleURI="http://www.seagate.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails_2">
        <link:definition>9955522 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails_3" roleURI="http://www.seagate.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails_3">
        <link:definition>9955522 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetInformationNarrativeDetails" roleURI="http://www.seagate.com/role/BalanceSheetInformationNarrativeDetails">
        <link:definition>9955523 - Disclosure - Balance Sheet Information (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetInformationNarrativeDetails_1" roleURI="http://www.seagate.com/role/BalanceSheetInformationNarrativeDetails_1">
        <link:definition>9955523 - Disclosure - Balance Sheet Information (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetInformationCashCashEquivalentsandRestrictedCashDetails" roleURI="http://www.seagate.com/role/BalanceSheetInformationCashCashEquivalentsandRestrictedCashDetails">
        <link:definition>9955524 - Disclosure - Balance Sheet Information (Cash, Cash Equivalents, and Restricted Cash) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetInformationInventoriesDetails" roleURI="http://www.seagate.com/role/BalanceSheetInformationInventoriesDetails">
        <link:definition>9955525 - Disclosure - Balance Sheet Information (Inventories) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetInformationOtherCurrentAssetsDetails" roleURI="http://www.seagate.com/role/BalanceSheetInformationOtherCurrentAssetsDetails">
        <link:definition>9955526 - Disclosure - Balance Sheet Information (Other Current Assets) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetInformationPropertyEquipmentandLeaseholdImprovementsnetDetails" roleURI="http://www.seagate.com/role/BalanceSheetInformationPropertyEquipmentandLeaseholdImprovementsnetDetails">
        <link:definition>9955527 - Disclosure - Balance Sheet Information (Property, Equipment and Leasehold Improvements, net) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetInformationAccruedExpensesDetails" roleURI="http://www.seagate.com/role/BalanceSheetInformationAccruedExpensesDetails">
        <link:definition>9955528 - Disclosure - Balance Sheet Information (Accrued Expenses) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetInformationAccumulatedOtherComprehensiveIncomeLossDetails" roleURI="http://www.seagate.com/role/BalanceSheetInformationAccumulatedOtherComprehensiveIncomeLossDetails">
        <link:definition>9955529 - Disclosure - Balance Sheet Information (Accumulated Other Comprehensive Income (Loss) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BalanceSheetInformationSupplierFinanceObligationDetails" roleURI="http://www.seagate.com/role/BalanceSheetInformationSupplierFinanceObligationDetails">
        <link:definition>9955530 - Disclosure - Balance Sheet Information (Supplier Finance Obligation) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandOtherIntangibleAssetsNarrativeDetails" roleURI="http://www.seagate.com/role/GoodwillandOtherIntangibleAssetsNarrativeDetails">
        <link:definition>9955531 - Disclosure - Goodwill and Other Intangible Assets (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtLongtermDebtDetails" roleURI="http://www.seagate.com/role/DebtLongtermDebtDetails">
        <link:definition>9955532 - Disclosure - Debt - Long-term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtNarrativeDetails" roleURI="http://www.seagate.com/role/DebtNarrativeDetails">
        <link:definition>9955533 - Disclosure - Debt - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtNarrativeDetails_1" roleURI="http://www.seagate.com/role/DebtNarrativeDetails_1">
        <link:definition>9955533 - Disclosure - Debt - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtTenderedDebtAgreementDetails" roleURI="http://www.seagate.com/role/DebtTenderedDebtAgreementDetails">
        <link:definition>9955534 - Disclosure - Debt (Tendered Debt Agreement) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtFutureprincipalpaymentsonlongtermdebtDetails" roleURI="http://www.seagate.com/role/DebtFutureprincipalpaymentsonlongtermdebtDetails">
        <link:definition>9955535 - Disclosure - Debt (Future principal payments on long-term debt) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesIncomeLossBeforeIncomeTaxesDetails" roleURI="http://www.seagate.com/role/IncomeTaxesIncomeLossBeforeIncomeTaxesDetails">
        <link:definition>9955536 - Disclosure - Income Taxes (Income (Loss) Before Income Taxes) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesScheduleofProvisionforBenefitFromIncomeTaxesDetails" roleURI="http://www.seagate.com/role/IncomeTaxesScheduleofProvisionforBenefitFromIncomeTaxesDetails">
        <link:definition>9955537 - Disclosure - Income Taxes (Schedule of Provision for (Benefit From) Income Taxes) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails" roleURI="http://www.seagate.com/role/IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails">
        <link:definition>9955538 - Disclosure - Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesNarrativeDetails" roleURI="http://www.seagate.com/role/IncomeTaxesNarrativeDetails">
        <link:definition>9955539 - Disclosure - Income Taxes (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesScheduleofReconciliationBetweenIncomeatStatutoryRateandEffectiveRateDetails" roleURI="http://www.seagate.com/role/IncomeTaxesScheduleofReconciliationBetweenIncomeatStatutoryRateandEffectiveRateDetails">
        <link:definition>9955540 - Disclosure - Income Taxes (Schedule of Reconciliation Between Income at Statutory Rate and Effective Rate) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesScheduleofGrossUnrecognizedTaxBenefitsDetails" roleURI="http://www.seagate.com/role/IncomeTaxesScheduleofGrossUnrecognizedTaxBenefitsDetails">
        <link:definition>9955541 - Disclosure - Income Taxes (Schedule of Gross Unrecognized Tax Benefits) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesIncomeTaxesPaidDetails" roleURI="http://www.seagate.com/role/IncomeTaxesIncomeTaxesPaidDetails">
        <link:definition>9955542 - Disclosure - Income Taxes - Income Taxes Paid (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesCodificationTopic842NarrativeDetails" roleURI="http://www.seagate.com/role/LeasesCodificationTopic842NarrativeDetails">
        <link:definition>9955543 - Disclosure - Leases, Codification Topic 842 (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesCodificationTopic842OperatingLeaseCostsDetails" roleURI="http://www.seagate.com/role/LeasesCodificationTopic842OperatingLeaseCostsDetails">
        <link:definition>9955544 - Disclosure - Leases, Codification Topic 842 (Operating Lease Costs) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesCodificationTopic842WeightedAverageROUAssetsandLeaseLiabilitiesDetails" roleURI="http://www.seagate.com/role/LeasesCodificationTopic842WeightedAverageROUAssetsandLeaseLiabilitiesDetails">
        <link:definition>9955545 - Disclosure - Leases, Codification Topic 842 (Weighted-Average, ROU Assets, and Lease Liabilities) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesCodificationTopic842FutureMinimumLeasePaymentsDetails" roleURI="http://www.seagate.com/role/LeasesCodificationTopic842FutureMinimumLeasePaymentsDetails">
        <link:definition>9955546 - Disclosure - Leases, Codification Topic 842 (Future Minimum Lease Payments) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesCodificationTopic842FutureMinimumLeasePaymentsDetails_1" roleURI="http://www.seagate.com/role/LeasesCodificationTopic842FutureMinimumLeasePaymentsDetails_1">
        <link:definition>9955546 - Disclosure - Leases, Codification Topic 842 (Future Minimum Lease Payments) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueNarrativeDetails" roleURI="http://www.seagate.com/role/FairValueNarrativeDetails">
        <link:definition>9955547 - Disclosure - Fair Value (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueNarrativeDetails_1" roleURI="http://www.seagate.com/role/FairValueNarrativeDetails_1">
        <link:definition>9955547 - Disclosure - Fair Value (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueScheduleofFairValuebyBalanceSheetGroupingMeasuredonRecurringBasisDetails" roleURI="http://www.seagate.com/role/FairValueScheduleofFairValuebyBalanceSheetGroupingMeasuredonRecurringBasisDetails">
        <link:definition>9955548 - Disclosure - Fair Value (Schedule of Fair Value, by Balance Sheet Grouping, Measured on Recurring Basis) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueScheduleofCarryingValuesandEstimatedFairValuesofDebtInstrumentsDetails" roleURI="http://www.seagate.com/role/FairValueScheduleofCarryingValuesandEstimatedFairValuesofDebtInstrumentsDetails">
        <link:definition>9955549 - Disclosure - Fair Value (Schedule of Carrying Values and Estimated Fair Values of Debt Instruments) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareholdersEquityNarrativeDetails" roleURI="http://www.seagate.com/role/ShareholdersEquityNarrativeDetails">
        <link:definition>9955550 - Disclosure - Shareholders' Equity (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SharebasedCompensationNarrativeDetails" roleURI="http://www.seagate.com/role/SharebasedCompensationNarrativeDetails">
        <link:definition>9955551 - Disclosure - Share-based Compensation (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SharebasedCompensationWeightedaverageassumptionsusedtodeterminethefairvalueDetails" roleURI="http://www.seagate.com/role/SharebasedCompensationWeightedaverageassumptionsusedtodeterminethefairvalueDetails">
        <link:definition>9955552 - Disclosure - Share-based Compensation (Weighted-average assumptions used to determine the fair value) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SharebasedCompensationNonvestedshareactivityDetails" roleURI="http://www.seagate.com/role/SharebasedCompensationNonvestedshareactivityDetails">
        <link:definition>9955553 - Disclosure - Share-based Compensation (Nonvested share activity) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SharebasedCompensationPerformanceawardactivityDetails" roleURI="http://www.seagate.com/role/SharebasedCompensationPerformanceawardactivityDetails">
        <link:definition>9955554 - Disclosure - Share-based Compensation (Performance award activity) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GuaranteesNarrativeDetails" roleURI="http://www.seagate.com/role/GuaranteesNarrativeDetails">
        <link:definition>9955555 - Disclosure - Guarantees (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GuaranteesProductWarrantyDetails" roleURI="http://www.seagate.com/role/GuaranteesProductWarrantyDetails">
        <link:definition>9955556 - Disclosure - Guarantees (Product Warranty) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareScheduleofcomputationofbasicanddilutednetincomelosspershareDetails" roleURI="http://www.seagate.com/role/EarningsPerShareScheduleofcomputationofbasicanddilutednetincomelosspershareDetails">
        <link:definition>9955557 - Disclosure - Earnings Per Share (Schedule of computation of basic and diluted net income (loss) per share) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LegalEnvironmentalandOtherContingenciesDetails" roleURI="http://www.seagate.com/role/LegalEnvironmentalandOtherContingenciesDetails">
        <link:definition>9955558 - Disclosure - Legal, Environmental and Other Contingencies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LegalEnvironmentalandOtherContingenciesDetails_1" roleURI="http://www.seagate.com/role/LegalEnvironmentalandOtherContingenciesDetails_1">
        <link:definition>9955558 - Disclosure - Legal, Environmental and Other Contingencies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsNarrativeDetails" roleURI="http://www.seagate.com/role/CommitmentsNarrativeDetails">
        <link:definition>9955559 - Disclosure - Commitments (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BusinessSegmentandGeographicInformationScheduleofRevenuefromExternalCustomersandLongLivedAssetsbyGeographicalAreasDetails" roleURI="http://www.seagate.com/role/BusinessSegmentandGeographicInformationScheduleofRevenuefromExternalCustomersandLongLivedAssetsbyGeographicalAreasDetails">
        <link:definition>9955560 - Disclosure - Business Segment and Geographic Information (Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueDetails" roleURI="http://www.seagate.com/role/RevenueDetails">
        <link:definition>9955561 - Disclosure - Revenue (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DivestureDetails" roleURI="http://www.seagate.com/role/DivestureDetails">
        <link:definition>9955562 - Disclosure - Divesture (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEventsDetails" roleURI="http://www.seagate.com/role/SubsequentEventsDetails">
        <link:definition>9955563 - Disclosure - Subsequent Events (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="stx_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="stx_RestructuringExpenseBenefit" abstract="false" name="RestructuringExpenseBenefit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_GainLossOnTerminationOfInterestRateSwapNet" abstract="false" name="GainLossOnTerminationOfInterestRateSwapNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_AdjustmentsToAdditionalPaidInCapitalCappedCallOptionsIssuanceOfConvertibleNotes" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalCappedCallOptionsIssuanceOfConvertibleNotes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_CommitmentsDisclosureAbstract" abstract="true" name="CommitmentsDisclosureAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="stx_ConcentrationRiskSupplierPolicyTextBlock" abstract="false" name="ConcentrationRiskSupplierPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="stx_ScheduleOfShareBasedPaymentAwardStockOptionAndEmployeeStockPurchasePlanValuationAssumptionsAndFairValueDisclosuresTableTextBlock" abstract="false" name="ScheduleOfShareBasedPaymentAwardStockOptionAndEmployeeStockPurchasePlanValuationAssumptionsAndFairValueDisclosuresTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="stx_ScheduleofFiscalYearsTable" abstract="true" name="ScheduleofFiscalYearsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="stx_OneCustomerMember" abstract="true" name="OneCustomerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_Customer2Member" abstract="true" name="Customer2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_Customer3Member" abstract="true" name="Customer3Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_ScheduleOfFiscalYearsLineItems" abstract="true" name="ScheduleOfFiscalYearsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="stx_EstablishmentOfWarrantyAccrualsAbstract" abstract="true" name="EstablishmentOfWarrantyAccrualsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="stx_ProductWarrantyPeriodTerm" abstract="false" name="ProductWarrantyPeriodTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="stx_AdvertisingExpenseAbstract" abstract="true" name="AdvertisingExpenseAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="stx_ContinuingInvolvementWithContinuedToBeRecognizedTransferredFinancialAssetsDiscount" abstract="false" name="ContinuingInvolvementWithContinuedToBeRecognizedTransferredFinancialAssetsDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_BuildingAndLeaseholdImprovementsMember" abstract="true" name="BuildingAndLeaseholdImprovementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_OtherLiabilitiesMiscellaneousNoncurrent" abstract="false" name="OtherLiabilitiesMiscellaneousNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_AccumulatedOtherComprehensiveIncomeLossAbstract" abstract="true" name="AccumulatedOtherComprehensiveIncomeLossAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="stx_AccumulatedOtherComprehensiveIncomeLossRollForward" abstract="true" name="AccumulatedOtherComprehensiveIncomeLossRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="stx_IntevacInc.Member" abstract="true" name="IntevacInc.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_UnsecuredSeniorNotesIssuedBySeagateHDDCaymanMember" abstract="true" name="UnsecuredSeniorNotesIssuedBySeagateHDDCaymanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_UnsecuredSeniorNotesIssuedBySeagateDataStorageTechnologyPte.LtdMember" abstract="true" name="UnsecuredSeniorNotesIssuedBySeagateDataStorageTechnologyPte.LtdMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNotes4091PercentDueJune2029Member" abstract="true" name="SeniorNotes4091PercentDueJune2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNotes3.125PercentDueJuly20291Member" abstract="true" name="SeniorNotes3.125PercentDueJuly20291Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNotes4.125PercentDueJanuary20311Member" abstract="true" name="SeniorNotes4.125PercentDueJanuary20311Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNotes3.375PercentDueJuly20311Member" abstract="true" name="SeniorNotes3.375PercentDueJuly20311Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_Seniornote5.75percentdueDecember2034Member" abstract="true" name="Seniornote5.75percentdueDecember2034Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNotes8.25PercentDueDecember20291Member" abstract="true" name="SeniorNotes8.25PercentDueDecember20291Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNotes8.50PercentDueJuly20311Member" abstract="true" name="SeniorNotes8.50PercentDueJuly20311Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNotes9.625PercentDueDecember20321Member" abstract="true" name="SeniorNotes9.625PercentDueDecember20321Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_ConvertibleSeniorNote350PercentDueJune2028Member" abstract="true" name="ConvertibleSeniorNote350PercentDueJune2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNotes5.875PercentDueJuly2030Member" abstract="true" name="SeniorNotes5.875PercentDueJuly2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNote4091PercentDueJune2029Member" abstract="true" name="SeniorNote4091PercentDueJune2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNotes4.125PercentDueJanuary20312Member" abstract="true" name="SeniorNotes4.125PercentDueJanuary20312Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNotes9.625PercentDueDecember20322Member" abstract="true" name="SeniorNotes9.625PercentDueDecember20322Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNotes3.125PercentDueJuly20292Member" abstract="true" name="SeniorNotes3.125PercentDueJuly20292Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNotes8.25PercentDueDecember20292Member" abstract="true" name="SeniorNotes8.25PercentDueDecember20292Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_TermsLoansA1A2AndA3Member" abstract="true" name="TermsLoansA1A2AndA3Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorUnsecuredRevolvingCreditFacilityMember" abstract="true" name="SeniorUnsecuredRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_NewCreditAgreementMember" abstract="true" name="NewCreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNote350PercentDueJune2028Member" abstract="true" name="SeniorNote350PercentDueJune2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNotes8.50PercentDueJuly20312Member" abstract="true" name="SeniorNotes8.50PercentDueJuly20312Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SwingLineLoansMember" abstract="true" name="SwingLineLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_DebtInstrumentCovenantLeverageRatioMaximum" abstract="false" name="DebtInstrumentCovenantLeverageRatioMaximum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="stx_DebtInstrumentOverAllotmentOptionAmount" abstract="false" name="DebtInstrumentOverAllotmentOptionAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_CappedCallTransactionPricePerShare" abstract="false" name="CappedCallTransactionPricePerShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="stx_DebtConversionConvertedInstrumentNonCashConversionExpense" abstract="false" name="DebtConversionConvertedInstrumentNonCashConversionExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_DebtInstrumentRedemptionAmount" abstract="false" name="DebtInstrumentRedemptionAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_DebtInstrumentRedemptionGainLoss" abstract="false" name="DebtInstrumentRedemptionGainLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_DeferredTaxAssetsTaxDeferredExpenseCapitalizedResearchExpense" abstract="false" name="DeferredTaxAssetsTaxDeferredExpenseCapitalizedResearchExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_DeferredTaxAssetsLeasingArrangements" abstract="false" name="DeferredTaxAssetsLeasingArrangements" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_DeferredTaxAssetsNetOperatingLosses" abstract="false" name="DeferredTaxAssetsNetOperatingLosses" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_DeferredTaxLiabilitiesDepreciation" abstract="false" name="DeferredTaxLiabilitiesDepreciation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_TaxCreditCarryforwardAmountNotSubjectToExpiration" abstract="false" name="TaxCreditCarryforwardAmountNotSubjectToExpiration" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_NetOperatingLossesSubjectToAnnualLimitationOnUse" abstract="false" name="NetOperatingLossesSubjectToAnnualLimitationOnUse" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_CapitalLossCarryforwardAmount" abstract="false" name="CapitalLossCarryforwardAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_TaxCreditCarryforwardsSubjectToAnnualLimitationOnUse" abstract="false" name="TaxCreditCarryforwardsSubjectToAnnualLimitationOnUse" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInterestExpenseAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInterestExpenseAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsInternalReOrganizationAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationOtherAdjustmentsInternalReOrganizationAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_EffectiveIncomeTaxRateReconciliationCapitalLossCarryforward" abstract="false" name="EffectiveIncomeTaxRateReconciliationCapitalLossCarryforward" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferentialAndOtherForeignTaxRateImpactsAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferentialAndOtherForeignTaxRateImpactsAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsQualifiedDomesticMinimumTopUpTaxAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationOtherAdjustmentsQualifiedDomesticMinimumTopUpTaxAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferentialAndOtherForeignTaxRateImpactsPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferentialAndOtherForeignTaxRateImpactsPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="stx_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInterestExpensePercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInterestExpensePercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="stx_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsInternalReOrganizationPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationOtherAdjustmentsInternalReOrganizationPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="stx_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsQualifiedDomesticMinimumTopUpTaxPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationOtherAdjustmentsQualifiedDomesticMinimumTopUpTaxPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="stx_NetGainsLossesFromInvestmentUnderMeasurementAlternative" abstract="false" name="NetGainsLossesFromInvestmentUnderMeasurementAlternative" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_TimedepositsandcertificatesofdepositMember" abstract="true" name="TimedepositsandcertificatesofdepositMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_CashandCashEquivalentsandShorttermInvestmentsFairValueDisclosure" abstract="false" name="CashandCashEquivalentsandShorttermInvestmentsFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_SeniorNotes5750PercentDueDecember2034Member" abstract="true" name="SeniorNotes5750PercentDueDecember2034Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeniorNotes3.375PercentDueJuly20312Member" abstract="true" name="SeniorNotes3.375PercentDueJuly20312Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_AuthorizedShareCapitalCommonAndPreferredStockValue" abstract="false" name="AuthorizedShareCapitalCommonAndPreferredStockValue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_RestrictedStockUnitsAndPerformanceShareUnitsMember" abstract="true" name="RestrictedStockUnitsAndPerformanceShareUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_EquityIncentivePlan2012Member" abstract="true" name="EquityIncentivePlan2012Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SeagateTechnologyplcStockPurchasePlanMember" abstract="true" name="SeagateTechnologyplcStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_FullValueShareAwardsMember" abstract="true" name="FullValueShareAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_PerformanceAwardTsrroicMember" abstract="true" name="PerformanceAwardTsrroicMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_NonvestedSharesMember" abstract="true" name="NonvestedSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_PerformanceAwardsMarketConditionMember" abstract="true" name="PerformanceAwardsMarketConditionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_EquityIncentivePlan2022Member" abstract="true" name="EquityIncentivePlan2022Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_ShareBasedCompensationAwardTrancheTwoThroughFourMember" abstract="true" name="ShareBasedCompensationAwardTrancheTwoThroughFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SharebasedCompensationArrangementbySharebasedPaymentAwardMaximumNumberofSharesPerOfferingPeriod" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardMaximumNumberofSharesPerOfferingPeriod" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="stx_ShareBasedCompensationArrangementVestingPeriodMaximum" abstract="false" name="ShareBasedCompensationArrangementVestingPeriodMaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="stx_ShareBasedCompensationArrangementByShareBasedPaymentAwardRemainingAwardVestingPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardRemainingAwardVestingPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="stx_SharebasedCompensationArrangementbySharebasedPaymentAwardPerformanceGoalsPeriod" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardPerformanceGoalsPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="stx_SharebasedCompensationArrangementbySharebasedPaymentAwardFairValueAssumptionsWeightedAverageExpectedDividendRate" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardFairValueAssumptionsWeightedAverageExpectedDividendRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="stx_IndemnificationsobligationstoOfficersandDirectors" abstract="false" name="IndemnificationsobligationstoOfficersandDirectors" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_Intellectualpropertyindemnificationobligations" abstract="false" name="Intellectualpropertyindemnificationobligations" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_LossContingencySettlementAmount" abstract="false" name="LossContingencySettlementAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_LossContingencySettlementQuarterlyInstallmentsAmount" abstract="false" name="LossContingencySettlementQuarterlyInstallmentsAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_LossContingencySettlementTermsPeriodOfPayments" abstract="false" name="LossContingencySettlementTermsPeriodOfPayments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="stx_LossContingencySettlementNumberOfAudits" abstract="false" name="LossContingencySettlementNumberOfAudits" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="stx_LossContingencySettlementNumberOfInternalAudits" abstract="false" name="LossContingencySettlementNumberOfInternalAudits" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="stx_LitigationSettlementNumberOfInternalAudits" abstract="false" name="LitigationSettlementNumberOfInternalAudits" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="stx_IncreaseDecreaseInAccrualForLossContingency" abstract="false" name="IncreaseDecreaseInAccrualForLossContingency" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_OtherCountriesMember" abstract="true" name="OtherCountriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_OEMsMember" abstract="true" name="OEMsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_DistributorsMember" abstract="true" name="DistributorsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_SoCOperationsMember" abstract="true" name="SoCOperationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssetsNet" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssetsNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_DisposalGroupIncludingDiscontinuedOperationConsiderationGross" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationConsiderationGross" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_DisposalGroupIncludingDiscontinuedOperationConsiderationIndemnificationReceivable" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationConsiderationIndemnificationReceivable" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_DisposalGroupIncludingDiscontinuedOperationConsiderationIndemnificationReceivableCurrent" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationConsiderationIndemnificationReceivableCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="stx_Dr.JohnC.MorrisMember" abstract="true" name="Dr.JohnC.MorrisMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_PratS.BhattMember" abstract="true" name="PratS.BhattMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="stx_GianlucaRomanoMember" abstract="true" name="GianlucaRomanoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
