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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019f398f-c731-7cb9-a7e2-2aa6481934f2,g:47c3e626-b1ad-4ee1-b3dc-dda2f58d7eb9-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="https://xbrl.org/2023/arcrole/summation-item" xlink:type="simple" xlink:href="https://www.xbrl.org/2023/calculation-1.1.xsd#summation-item"/>
  <link:roleRef roleURI="http://www.heliusmedical.com/role/CondensedConsolidatedBalanceSheets" xlink:type="simple" xlink:href="hsdt-20260630.xsd#CondensedConsolidatedBalanceSheets"/>
  <link:calculationLink xlink:role="http://www.heliusmedical.com/role/CondensedConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019f398f-c7e7-75c3-b998-cfe582e04dca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_AccruedAndOtherCurrentLiabilities_019f398f-c7e7-70db-9a08-a4c36cc34bf1" xlink:href="hsdt-20260630.xsd#hsdt_AccruedAndOtherCurrentLiabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019f398f-c7e7-75c3-b998-cfe582e04dca" xlink:to="loc_hsdt_AccruedAndOtherCurrentLiabilities_019f398f-c7e7-70db-9a08-a4c36cc34bf1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019f398f-c7e7-7911-a406-af069e4c67f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019f398f-c7e7-75c3-b998-cfe582e04dca" xlink:to="loc_us-gaap_AccountsPayableCurrent_019f398f-c7e7-7911-a406-af069e4c67f5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019f398f-c7e7-79f3-9d10-6ec55f3bd488" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019f398f-c7e7-79a8-8bcd-5e47beb03b8c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019f398f-c7e7-79f3-9d10-6ec55f3bd488" xlink:to="loc_us-gaap_CommonStockValue_019f398f-c7e7-79a8-8bcd-5e47beb03b8c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_019f398f-c7e7-7199-917f-b3af342ed22d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019f398f-c7e7-79f3-9d10-6ec55f3bd488" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_019f398f-c7e7-7199-917f-b3af342ed22d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonValue_019f398f-c7e7-7b6c-b93d-982c13963f5b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockCommonValue"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019f398f-c7e7-79f3-9d10-6ec55f3bd488" xlink:to="loc_us-gaap_TreasuryStockCommonValue_019f398f-c7e7-7b6c-b93d-982c13963f5b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019f398f-c7e7-7c22-b41b-e4a27788557b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019f398f-c7e7-79f3-9d10-6ec55f3bd488" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019f398f-c7e7-7c22-b41b-e4a27788557b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019f398f-c7e7-7363-9c6c-530cecf7d7f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019f398f-c7e7-79f3-9d10-6ec55f3bd488" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019f398f-c7e7-7363-9c6c-530cecf7d7f8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019fb121-f5db-7d3e-8e12-964670d952a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019fb121-f5db-7f1a-9301-a097b18be1ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019fb121-f5db-7d3e-8e12-964670d952a8" xlink:to="loc_us-gaap_LiabilitiesCurrent_019fb121-f5db-7f1a-9301-a097b18be1ae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesNoncurrent_019fb121-f5db-7149-b736-1aa1b53c5ad2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019fb121-f5db-7d3e-8e12-964670d952a8" xlink:to="loc_us-gaap_DerivativeLiabilitiesNoncurrent_019fb121-f5db-7149-b736-1aa1b53c5ad2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019f398f-c7e7-7da2-9b1f-7ac8d5b22dcc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019f398f-c7e7-746e-9113-55dc994ce545" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f398f-c7e7-7da2-9b1f-7ac8d5b22dcc" xlink:to="loc_us-gaap_AssetsCurrent_019f398f-c7e7-746e-9113-55dc994ce545" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_CryptoAssetFairValueUnrestrictedNoncurrent_019f398f-c7e7-7f27-a695-5f2453cc33da" xlink:href="hsdt-20260630.xsd#hsdt_CryptoAssetFairValueUnrestrictedNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f398f-c7e7-7da2-9b1f-7ac8d5b22dcc" xlink:to="loc_hsdt_CryptoAssetFairValueUnrestrictedNoncurrent_019f398f-c7e7-7f27-a695-5f2453cc33da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_LockedPipeSolDigitalAssetsNoncurrent_019f398f-c7e7-7eed-9120-2728f9a5ddbc" xlink:href="hsdt-20260630.xsd#hsdt_LockedPipeSolDigitalAssetsNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f398f-c7e7-7da2-9b1f-7ac8d5b22dcc" xlink:to="loc_hsdt_LockedPipeSolDigitalAssetsNoncurrent_019f398f-c7e7-7eed-9120-2728f9a5ddbc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_ReceivableForDigitalAssetsNonCurrent_019f398f-c7e7-7830-be72-cdc1c41229da" xlink:href="hsdt-20260630.xsd#hsdt_ReceivableForDigitalAssetsNonCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f398f-c7e7-7da2-9b1f-7ac8d5b22dcc" xlink:to="loc_hsdt_ReceivableForDigitalAssetsNonCurrent_019f398f-c7e7-7830-be72-cdc1c41229da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_InvestmentInDigitalAssetsFundNonCurrent_019f398f-c7e7-7af4-9077-dec287f28b5b" xlink:href="hsdt-20260630.xsd#hsdt_InvestmentInDigitalAssetsFundNonCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f398f-c7e7-7da2-9b1f-7ac8d5b22dcc" xlink:to="loc_hsdt_InvestmentInDigitalAssetsFundNonCurrent_019f398f-c7e7-7af4-9077-dec287f28b5b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019f398f-c7e7-7ecf-82cd-91b98134a2e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f398f-c7e7-7da2-9b1f-7ac8d5b22dcc" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019f398f-c7e7-7ecf-82cd-91b98134a2e8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019f398f-c7e7-705e-98a1-83b3d16d358e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019f398f-c7e7-7b13-ae28-36342e651a76" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019f398f-c7e7-705e-98a1-83b3d16d358e" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019f398f-c7e7-7b13-ae28-36342e651a76" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019f398f-c7e7-79aa-b136-5141ec3e82a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019f398f-c7e7-705e-98a1-83b3d16d358e" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019f398f-c7e7-79aa-b136-5141ec3e82a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_CryptoAssetFairValueUnrestrictedCurrent_019f398f-c7e7-7d64-aaae-48c0fe29fbd4" xlink:href="hsdt-20260630.xsd#hsdt_CryptoAssetFairValueUnrestrictedCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019f398f-c7e7-705e-98a1-83b3d16d358e" xlink:to="loc_hsdt_CryptoAssetFairValueUnrestrictedCurrent_019f398f-c7e7-7d64-aaae-48c0fe29fbd4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_DigitalAssetsCollateralReceivableCurrent_019fb11f-f457-7367-88a4-dbaebc5151a8" xlink:href="hsdt-20260630.xsd#hsdt_DigitalAssetsCollateralReceivableCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019f398f-c7e7-705e-98a1-83b3d16d358e" xlink:to="loc_hsdt_DigitalAssetsCollateralReceivableCurrent_019fb11f-f457-7367-88a4-dbaebc5151a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019fb161-6a01-78eb-bb0f-6f4c1b26de08" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019fb161-6a01-7b4f-84f1-82aa3963e3cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019fb161-6a01-78eb-bb0f-6f4c1b26de08" xlink:to="loc_us-gaap_Liabilities_019fb161-6a01-7b4f-84f1-82aa3963e3cc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_019fb161-6a01-7a03-840f-1654fe701aaf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019fb161-6a01-78eb-bb0f-6f4c1b26de08" xlink:to="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_019fb161-6a01-7a03-840f-1654fe701aaf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019fb161-6a01-76bb-bfad-f8760c2866bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019fb161-6a01-78eb-bb0f-6f4c1b26de08" xlink:to="loc_us-gaap_StockholdersEquity_019fb161-6a01-76bb-bfad-f8760c2866bf" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.heliusmedical.com/role/CondensedConsolidatedStatementsofOperationsandComprehensiveLoss" xlink:type="simple" xlink:href="hsdt-20260630.xsd#CondensedConsolidatedStatementsofOperationsandComprehensiveLoss"/>
  <link:calculationLink xlink:role="http://www.heliusmedical.com/role/CondensedConsolidatedStatementsofOperationsandComprehensiveLoss" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019f398f-c7e7-7f64-beb0-26070c5ac1f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019f398f-c7e7-77fa-85c8-ffb25e00e8eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_019f398f-c7e7-7f64-beb0-26070c5ac1f6" xlink:to="loc_us-gaap_Revenues_019f398f-c7e7-77fa-85c8-ffb25e00e8eb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_019f398f-c7e7-75d1-a48f-ce1f8cbd6b19" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfRevenue"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_019f398f-c7e7-7f64-beb0-26070c5ac1f6" xlink:to="loc_us-gaap_CostOfRevenue_019f398f-c7e7-75d1-a48f-ce1f8cbd6b19" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_019fddd5-12e2-7671-a973-e78a43fd2a70" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnDerivatives_019fddd5-12e2-72ac-b9c7-7bd4e211f269" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrealizedGainLossOnDerivatives"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_019fddd5-12e2-7671-a973-e78a43fd2a70" xlink:to="loc_us-gaap_UnrealizedGainLossOnDerivatives_019fddd5-12e2-72ac-b9c7-7bd4e211f269" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_019fddd5-12e2-7fb5-ba2b-dc4b68db4a8f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfBusiness"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_019fddd5-12e2-7671-a973-e78a43fd2a70" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_019fddd5-12e2-7fb5-ba2b-dc4b68db4a8f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019fddd5-12e2-7df0-a5cf-b8813a34730f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_019fddd5-12e2-7671-a973-e78a43fd2a70" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019fddd5-12e2-7df0-a5cf-b8813a34730f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_FinancingCosts_019fddd5-12e2-7d41-b8ca-fbd8036de90d" xlink:href="hsdt-20260630.xsd#hsdt_FinancingCosts"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_019fddd5-12e2-7671-a973-e78a43fd2a70" xlink:to="loc_hsdt_FinancingCosts_019fddd5-12e2-7d41-b8ca-fbd8036de90d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019f398f-c7e7-743d-8860-59c13cd22825" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019f398f-c7e7-7d94-ad7d-1ecf019b4f88" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019f398f-c7e7-743d-8860-59c13cd22825" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019f398f-c7e7-7d94-ad7d-1ecf019b4f88" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f398f-c7e7-7864-b2fb-db2616fb48b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019f398f-c7e7-743d-8860-59c13cd22825" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f398f-c7e7-7864-b2fb-db2616fb48b1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f398f-c7e7-7804-9c02-5b2793f79406" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_019f398f-c7e7-7dc0-bf33-11924acf9cfa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f398f-c7e7-7804-9c02-5b2793f79406" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_019f398f-c7e7-7dc0-bf33-11924acf9cfa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019f398f-c7e7-78ba-8889-2f78f646fb7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f398f-c7e7-7804-9c02-5b2793f79406" xlink:to="loc_us-gaap_OperatingIncomeLoss_019f398f-c7e7-78ba-8889-2f78f646fb7e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019f398f-c7e7-7682-b498-0dc6f9813bbd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019f398f-c7e7-72a1-8899-02c92d296e16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019f398f-c7e7-7682-b498-0dc6f9813bbd" xlink:to="loc_us-gaap_GrossProfit_019f398f-c7e7-72a1-8899-02c92d296e16" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019f398f-c7e7-7b3a-955e-ad4f4259d665" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpenses"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019f398f-c7e7-7682-b498-0dc6f9813bbd" xlink:to="loc_us-gaap_OperatingExpenses_019f398f-c7e7-7b3a-955e-ad4f4259d665" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019f398f-c7e7-7372-93fa-479c7dec0547" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_StakingRewardsIncome_019f398f-c7e7-7e89-8682-f67cc5ee49a8" xlink:href="hsdt-20260630.xsd#hsdt_StakingRewardsIncome"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_019f398f-c7e7-7372-93fa-479c7dec0547" xlink:to="loc_hsdt_StakingRewardsIncome_019f398f-c7e7-7e89-8682-f67cc5ee49a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueNotFromContractWithCustomerOther_019f398f-c7e7-70dd-9cb9-17c035a6a15b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueNotFromContractWithCustomerOther"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_019f398f-c7e7-7372-93fa-479c7dec0547" xlink:to="loc_us-gaap_RevenueNotFromContractWithCustomerOther_019f398f-c7e7-70dd-9cb9-17c035a6a15b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019fddd9-0e7d-78aa-bdca-c87136a1ea35" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_019fddd9-0e7d-7bcb-83ea-8fdabf5b0bf0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_019fddd9-0e7d-78aa-bdca-c87136a1ea35" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_019fddd9-0e7d-7bcb-83ea-8fdabf5b0bf0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_DigitalIntangibleAssetsAndDigitalAssetsReceivableUnrealizedGainLossOperating_019fddd9-0e7d-75c7-ad98-c0ed12020c82" xlink:href="hsdt-20260630.xsd#hsdt_DigitalIntangibleAssetsAndDigitalAssetsReceivableUnrealizedGainLossOperating"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_019fddd9-0e7d-78aa-bdca-c87136a1ea35" xlink:to="loc_hsdt_DigitalIntangibleAssetsAndDigitalAssetsReceivableUnrealizedGainLossOperating_019fddd9-0e7d-75c7-ad98-c0ed12020c82" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_DigitalIntangibleAssetsRealizedGainLossOperating_019fddd9-0e7d-7ffe-83bc-5286594d3960" xlink:href="hsdt-20260630.xsd#hsdt_DigitalIntangibleAssetsRealizedGainLossOperating"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_019fddd9-0e7d-78aa-bdca-c87136a1ea35" xlink:to="loc_hsdt_DigitalIntangibleAssetsRealizedGainLossOperating_019fddd9-0e7d-7ffe-83bc-5286594d3960" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_DigitalAssetsFundInvestmentUnrealizedGainLossOperating_019fddd9-0e7d-7642-ba74-86e8d44286dd" xlink:href="hsdt-20260630.xsd#hsdt_DigitalAssetsFundInvestmentUnrealizedGainLossOperating"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_019fddd9-0e7d-78aa-bdca-c87136a1ea35" xlink:to="loc_hsdt_DigitalAssetsFundInvestmentUnrealizedGainLossOperating_019fddd9-0e7d-7642-ba74-86e8d44286dd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019fddd9-0e7d-7484-b4b9-60525e586f16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_019fddd9-0e7d-78aa-bdca-c87136a1ea35" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019fddd9-0e7d-7484-b4b9-60525e586f16" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_019f398f-c7e7-7744-9506-0e36a3149b00" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019f398f-c7e7-7019-be37-78566978f991" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_019f398f-c7e7-7744-9506-0e36a3149b00" xlink:to="loc_us-gaap_NetIncomeLoss_019f398f-c7e7-7019-be37-78566978f991" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_019f398f-c7e7-739d-bfd9-d1910317ac19" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_019f398f-c7e7-7744-9506-0e36a3149b00" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_019f398f-c7e7-739d-bfd9-d1910317ac19" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.heliusmedical.com/role/CondensedConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="hsdt-20260630.xsd#CondensedConsolidatedStatementsofCashFlows"/>
  <link:calculationLink xlink:role="http://www.heliusmedical.com/role/CondensedConsolidatedStatementsofCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019f398f-c7e7-7b95-a02a-f29858b73f76" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-76e0-9b9e-cdadf07b157e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019f398f-c7e7-7b95-a02a-f29858b73f76" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-76e0-9b9e-cdadf07b157e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f398f-c7e7-7a22-87ae-cccc8780df22" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019f398f-c7e7-7b95-a02a-f29858b73f76" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f398f-c7e7-7a22-87ae-cccc8780df22" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f398f-c7e7-7c34-b876-1198b1d309c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019f398f-c7e7-7b95-a02a-f29858b73f76" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f398f-c7e7-7c34-b876-1198b1d309c4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f398f-c7e7-7d04-9316-a9ce87e99213" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentForAcquisitionCryptoAsset_019fb1df-2c11-7da3-bf02-52bc4e673cf9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentForAcquisitionCryptoAsset"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f398f-c7e7-7d04-9316-a9ce87e99213" xlink:to="loc_us-gaap_PaymentForAcquisitionCryptoAsset_019fb1df-2c11-7da3-bf02-52bc4e673cf9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDisposalCryptoAsset_019fb1df-2c11-70ff-8766-770fc58e5a48" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromDisposalCryptoAsset"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f398f-c7e7-7d04-9316-a9ce87e99213" xlink:to="loc_us-gaap_ProceedsFromDisposalCryptoAsset_019fb1df-2c11-70ff-8766-770fc58e5a48" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_CashPostedAsDerivativeMarginCollateral_019fb1df-2c11-7ea9-aa10-6e9436b43d9c" xlink:href="hsdt-20260630.xsd#hsdt_CashPostedAsDerivativeMarginCollateral"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f398f-c7e7-7d04-9316-a9ce87e99213" xlink:to="loc_hsdt_CashPostedAsDerivativeMarginCollateral_019fb1df-2c11-7ea9-aa10-6e9436b43d9c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_CashReturnedFromDerivativeMarginCollateral_019fb1df-2c11-7f31-be46-91a5dd5a7003" xlink:href="hsdt-20260630.xsd#hsdt_CashReturnedFromDerivativeMarginCollateral"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f398f-c7e7-7d04-9316-a9ce87e99213" xlink:to="loc_hsdt_CashReturnedFromDerivativeMarginCollateral_019fb1df-2c11-7f31-be46-91a5dd5a7003" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities_019fb1df-2c11-74e9-9315-e5abb93d1a27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f398f-c7e7-7d04-9316-a9ce87e99213" xlink:to="loc_us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities_019fb1df-2c11-74e9-9315-e5abb93d1a27" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForDerivativeInstrumentInvestingActivities_019fb1df-2c11-7322-9ed9-f6de39b18000" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForDerivativeInstrumentInvestingActivities"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f398f-c7e7-7d04-9316-a9ce87e99213" xlink:to="loc_us-gaap_PaymentsForDerivativeInstrumentInvestingActivities_019fb1df-2c11-7322-9ed9-f6de39b18000" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_019f398f-c7e7-7567-be84-b55744d3e3ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f398f-c7e7-7d04-9316-a9ce87e99213" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_019f398f-c7e7-7567-be84-b55744d3e3ca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_019fb69a-6bdd-7668-b3f5-660623a657b3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f398f-c7e7-7d04-9316-a9ce87e99213" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_019fb69a-6bdd-7668-b3f5-660623a657b3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f398f-c7e7-70fe-997d-1f673c9b9322" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_ProceedsFromIssuanceOfCommonStockInRegisteredDirectOffering_019f398f-c7e7-73dd-9e72-c761e4717d37" xlink:href="hsdt-20260630.xsd#hsdt_ProceedsFromIssuanceOfCommonStockInRegisteredDirectOffering"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f398f-c7e7-70fe-997d-1f673c9b9322" xlink:to="loc_hsdt_ProceedsFromIssuanceOfCommonStockInRegisteredDirectOffering_019f398f-c7e7-73dd-9e72-c761e4717d37" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_019f398f-c7e7-7a05-9af2-cfdc2649b768" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f398f-c7e7-70fe-997d-1f673c9b9322" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_019f398f-c7e7-7a05-9af2-cfdc2649b768" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfPrivatePlacement_019f398f-c7e7-7574-b4c0-6298c5309730" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfPrivatePlacement"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f398f-c7e7-70fe-997d-1f673c9b9322" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfPrivatePlacement_019f398f-c7e7-7574-b4c0-6298c5309730" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromWarrantExercises_019f398f-c7e7-734c-ba0a-ac6b9b484df8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromWarrantExercises"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f398f-c7e7-70fe-997d-1f673c9b9322" xlink:to="loc_us-gaap_ProceedsFromWarrantExercises_019f398f-c7e7-734c-ba0a-ac6b9b484df8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_019fb1e7-61de-7a13-90bb-0ed0e600ef63" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f398f-c7e7-70fe-997d-1f673c9b9322" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_019fb1e7-61de-7a13-90bb-0ed0e600ef63" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_019fb1e7-61de-7eca-82f4-76646acc8df5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f398f-c7e7-70fe-997d-1f673c9b9322" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_019fb1e7-61de-7eca-82f4-76646acc8df5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfMediumTermNotes_019fb1e7-61de-7005-96d8-e0f940b47be8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfMediumTermNotes"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f398f-c7e7-70fe-997d-1f673c9b9322" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfMediumTermNotes_019fb1e7-61de-7005-96d8-e0f940b47be8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfNotesPayable_019fb1e7-61de-702c-8121-e3e7001e9ef0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfNotesPayable"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f398f-c7e7-70fe-997d-1f673c9b9322" xlink:to="loc_us-gaap_RepaymentsOfNotesPayable_019fb1e7-61de-702c-8121-e3e7001e9ef0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019f398f-c7e7-78e4-9e64-743cef33781a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_us-gaap_ProfitLoss_019f398f-c7e7-78e4-9e64-743cef33781a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_AmortizationOfDebtDiscountAndImputedInterestExpense_019f398f-c7e7-7630-8ad1-4191b2256806" xlink:href="hsdt-20260630.xsd#hsdt_AmortizationOfDebtDiscountAndImputedInterestExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_hsdt_AmortizationOfDebtDiscountAndImputedInterestExpense_019f398f-c7e7-7630-8ad1-4191b2256806" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_019f398f-c7e7-7227-b054-d090656066b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_019f398f-c7e7-7227-b054-d090656066b8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_StakingRewardsIncome_019f398f-c7e7-7153-baf6-9deeb49925c2" xlink:href="hsdt-20260630.xsd#hsdt_StakingRewardsIncome"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_hsdt_StakingRewardsIncome_019f398f-c7e7-7153-baf6-9deeb49925c2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_019f398f-c7e7-7936-94c2-99f768baa6cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfBusiness"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_019f398f-c7e7-7936-94c2-99f768baa6cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_DerivativeGainLossOnDerivativeNetCashFlowImpact_019f398f-c7e7-793d-ac50-c590dd913e57" xlink:href="hsdt-20260630.xsd#hsdt_DerivativeGainLossOnDerivativeNetCashFlowImpact"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_hsdt_DerivativeGainLossOnDerivativeNetCashFlowImpact_019f398f-c7e7-793d-ac50-c590dd913e57" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_NetChangeInFairValueOfDigitalIntangibleAssetsAndDigitalAssetsReceivableOperating_019f398f-c7e7-7b81-aede-ca760a2054d1" xlink:href="hsdt-20260630.xsd#hsdt_NetChangeInFairValueOfDigitalIntangibleAssetsAndDigitalAssetsReceivableOperating"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_hsdt_NetChangeInFairValueOfDigitalIntangibleAssetsAndDigitalAssetsReceivableOperating_019f398f-c7e7-7b81-aede-ca760a2054d1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_NetChangeInFairValueOfDigitalAssetsFundInvestmentOperating_019f398f-c7e7-746d-9fd2-fad4b52772ae" xlink:href="hsdt-20260630.xsd#hsdt_NetChangeInFairValueOfDigitalAssetsFundInvestmentOperating"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_hsdt_NetChangeInFairValueOfDigitalAssetsFundInvestmentOperating_019f398f-c7e7-746d-9fd2-fad4b52772ae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_DigitalIntangibleAssetsRealizedGainLossOperating_019f398f-c7e7-7abf-8256-0c6e263fcd04" xlink:href="hsdt-20260630.xsd#hsdt_DigitalIntangibleAssetsRealizedGainLossOperating"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_hsdt_DigitalIntangibleAssetsRealizedGainLossOperating_019f398f-c7e7-7abf-8256-0c6e263fcd04" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019f398f-c7e7-7ea8-ac9a-232483a43694" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019f398f-c7e7-7ea8-ac9a-232483a43694" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_019f398f-c7e7-7a98-9d65-dc907e771c2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_us-gaap_ShareBasedCompensation_019f398f-c7e7-7a98-9d65-dc907e771c2a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_019f398f-c7e7-77ef-bfb3-0a2f5cd083c2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNoncashIncomeExpense"/>
    <link:calculationArc order="12" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_019f398f-c7e7-77ef-bfb3-0a2f5cd083c2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019fb1c0-8e9f-7407-9b35-52c971ae3750" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:calculationArc order="13" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019fb1c0-8e9f-7407-9b35-52c971ae3750" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019fb1c0-8e9f-7417-97b8-6e3ae2b527fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019fb1c0-8e9f-7417-97b8-6e3ae2b527fa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_019fb1c0-8e9f-74d6-b772-a7c238a656b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_019fb1c0-8e9f-74d6-b772-a7c238a656b8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019fb1c0-8e9f-794e-b7fd-ca5992df0864" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f398f-c7e7-71a2-87fd-5d21e6bc2982" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019fb1c0-8e9f-794e-b7fd-ca5992df0864" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.heliusmedical.com/role/DIGITALASSETSScheduleoftheCompanysLockedPIPESOLSummarizedbyYearDetails" xlink:type="simple" xlink:href="hsdt-20260630.xsd#DIGITALASSETSScheduleoftheCompanysLockedPIPESOLSummarizedbyYearDetails"/>
  <link:calculationLink xlink:role="http://www.heliusmedical.com/role/DIGITALASSETSScheduleoftheCompanysLockedPIPESOLSummarizedbyYearDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CryptoAssetNumberOfRestrictedUnits_019f5ae9-908e-7c9f-81db-d867550fa12e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CryptoAssetNumberOfRestrictedUnits"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_CryptoAssetNumberOfRestrictedUnitsUnlockedYear1_019f5ae9-908e-74ac-a0ab-82a47a6e980c" xlink:href="hsdt-20260630.xsd#hsdt_CryptoAssetNumberOfRestrictedUnitsUnlockedYear1"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CryptoAssetNumberOfRestrictedUnits_019f5ae9-908e-7c9f-81db-d867550fa12e" xlink:to="loc_hsdt_CryptoAssetNumberOfRestrictedUnitsUnlockedYear1_019f5ae9-908e-74ac-a0ab-82a47a6e980c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_CryptoAssetNumberOfRestrictedUnitsUnlockedYear2_019f5ae9-908e-72e8-8bed-5eaa04adb340" xlink:href="hsdt-20260630.xsd#hsdt_CryptoAssetNumberOfRestrictedUnitsUnlockedYear2"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CryptoAssetNumberOfRestrictedUnits_019f5ae9-908e-7c9f-81db-d867550fa12e" xlink:to="loc_hsdt_CryptoAssetNumberOfRestrictedUnitsUnlockedYear2_019f5ae9-908e-72e8-8bed-5eaa04adb340" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_CryptoAssetNumberOfRestrictedUnitsUnlockedYear3_019f5ae9-908e-7cba-a57b-6cccbdf132c7" xlink:href="hsdt-20260630.xsd#hsdt_CryptoAssetNumberOfRestrictedUnitsUnlockedYear3"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CryptoAssetNumberOfRestrictedUnits_019f5ae9-908e-7c9f-81db-d867550fa12e" xlink:to="loc_hsdt_CryptoAssetNumberOfRestrictedUnitsUnlockedYear3_019f5ae9-908e-7cba-a57b-6cccbdf132c7" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.heliusmedical.com/role/DIGITALASSETSScheduleoftheCompanysDigitalAssetsHoldingsDetails" xlink:type="simple" xlink:href="hsdt-20260630.xsd#DIGITALASSETSScheduleoftheCompanysDigitalAssetsHoldingsDetails"/>
  <link:calculationLink xlink:role="http://www.heliusmedical.com/role/DIGITALASSETSScheduleoftheCompanysDigitalAssetsHoldingsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CryptoAssetFairValue_019f5ae8-b062-7dfe-a3b9-d567f0eb7a81" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CryptoAssetFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CryptoAssetFairValueUnrestricted_019f5ae8-b062-76d8-bc0c-beb4170f9435" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CryptoAssetFairValueUnrestricted"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CryptoAssetFairValue_019f5ae8-b062-7dfe-a3b9-d567f0eb7a81" xlink:to="loc_us-gaap_CryptoAssetFairValueUnrestricted_019f5ae8-b062-76d8-bc0c-beb4170f9435" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CryptoAssetFairValueRestricted_019f5ae8-b062-7fb6-bb2d-293ad7869b45" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CryptoAssetFairValueRestricted"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CryptoAssetFairValue_019f5ae8-b062-7dfe-a3b9-d567f0eb7a81" xlink:to="loc_us-gaap_CryptoAssetFairValueRestricted_019f5ae8-b062-7fb6-bb2d-293ad7869b45" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CryptoAssetNumberOfUnits_019f5ae8-c78c-7f77-aadc-098016e9279b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CryptoAssetNumberOfUnits"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CryptoAssetNumberOfUnrestrictedUnits_019f5ae8-c78c-702d-89c1-a892599d34f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CryptoAssetNumberOfUnrestrictedUnits"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CryptoAssetNumberOfUnits_019f5ae8-c78c-7f77-aadc-098016e9279b" xlink:to="loc_us-gaap_CryptoAssetNumberOfUnrestrictedUnits_019f5ae8-c78c-702d-89c1-a892599d34f5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CryptoAssetNumberOfRestrictedUnits_019f5ae8-c78c-73f7-8c90-cbdb170af2de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CryptoAssetNumberOfRestrictedUnits"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CryptoAssetNumberOfUnits_019f5ae8-c78c-7f77-aadc-098016e9279b" xlink:to="loc_us-gaap_CryptoAssetNumberOfRestrictedUnits_019f5ae8-c78c-73f7-8c90-cbdb170af2de" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_CryptoAssetNumberOfUnitsStaked_019f5ae8-5b02-70a6-b4d5-b39764c96334" xlink:href="hsdt-20260630.xsd#hsdt_CryptoAssetNumberOfUnitsStaked"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_CryptoAssetNumberOfUnrestrictedUnitsStaked_019f5ae8-5b02-75b3-9c88-0a0c11843aa7" xlink:href="hsdt-20260630.xsd#hsdt_CryptoAssetNumberOfUnrestrictedUnitsStaked"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_hsdt_CryptoAssetNumberOfUnitsStaked_019f5ae8-5b02-70a6-b4d5-b39764c96334" xlink:to="loc_hsdt_CryptoAssetNumberOfUnrestrictedUnitsStaked_019f5ae8-5b02-75b3-9c88-0a0c11843aa7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_CryptoAssetNumberOfRestrictedUnitsStacked_019f5ae8-5b02-7d20-bcc6-404308835ef5" xlink:href="hsdt-20260630.xsd#hsdt_CryptoAssetNumberOfRestrictedUnitsStacked"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_hsdt_CryptoAssetNumberOfUnitsStaked_019f5ae8-5b02-70a6-b4d5-b39764c96334" xlink:to="loc_hsdt_CryptoAssetNumberOfRestrictedUnitsStacked_019f5ae8-5b02-7d20-bcc6-404308835ef5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CryptoAssetCost_019f5ae8-9b72-73d9-99dd-5e5a102c1b6d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CryptoAssetCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CryptoAssetCostUnrestricted_019f5ae8-9b72-7833-b0f7-07e7796d7dea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CryptoAssetCostUnrestricted"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CryptoAssetCost_019f5ae8-9b72-73d9-99dd-5e5a102c1b6d" xlink:to="loc_us-gaap_CryptoAssetCostUnrestricted_019f5ae8-9b72-7833-b0f7-07e7796d7dea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CryptoAssetCostRestricted_019f5ae8-9b72-73a5-b41e-44c998572e35" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CryptoAssetCostRestricted"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CryptoAssetCost_019f5ae8-9b72-73d9-99dd-5e5a102c1b6d" xlink:to="loc_us-gaap_CryptoAssetCostRestricted_019f5ae8-9b72-73a5-b41e-44c998572e35" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.heliusmedical.com/role/DIGITALASSETSRECEIVABLEScheduleofLockedSOLReceivableMonthlyUnlockDistributionDetails" xlink:type="simple" xlink:href="hsdt-20260630.xsd#DIGITALASSETSRECEIVABLEScheduleofLockedSOLReceivableMonthlyUnlockDistributionDetails"/>
  <link:calculationLink xlink:role="http://www.heliusmedical.com/role/DIGITALASSETSRECEIVABLEScheduleofLockedSOLReceivableMonthlyUnlockDistributionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_ReceivableForDigitalAssetsNumberOfRestrictedUnits_019f398f-c7e7-737b-aa29-903dcb53eb97" xlink:href="hsdt-20260630.xsd#hsdt_ReceivableForDigitalAssetsNumberOfRestrictedUnits"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_ReceivableForDigitalAssetsNumberOfRestrictedUnitsUnlockedYear1_019f398f-c7e7-7d19-9557-59a2b2c1d576" xlink:href="hsdt-20260630.xsd#hsdt_ReceivableForDigitalAssetsNumberOfRestrictedUnitsUnlockedYear1"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_hsdt_ReceivableForDigitalAssetsNumberOfRestrictedUnits_019f398f-c7e7-737b-aa29-903dcb53eb97" xlink:to="loc_hsdt_ReceivableForDigitalAssetsNumberOfRestrictedUnitsUnlockedYear1_019f398f-c7e7-7d19-9557-59a2b2c1d576" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_ReceivableForDigitalAssetsNumberOfRestrictedUnitsUnlockedYear2_019f398f-c7e7-7b9d-9f80-2b6d9a32ad26" xlink:href="hsdt-20260630.xsd#hsdt_ReceivableForDigitalAssetsNumberOfRestrictedUnitsUnlockedYear2"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_hsdt_ReceivableForDigitalAssetsNumberOfRestrictedUnits_019f398f-c7e7-737b-aa29-903dcb53eb97" xlink:to="loc_hsdt_ReceivableForDigitalAssetsNumberOfRestrictedUnitsUnlockedYear2_019f398f-c7e7-7b9d-9f80-2b6d9a32ad26" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_ReceivableForDigitalAssetsNumberOfRestrictedUnitsUnlockedYear3_019f398f-c7e7-75a1-af4c-3521fe5c4a18" xlink:href="hsdt-20260630.xsd#hsdt_ReceivableForDigitalAssetsNumberOfRestrictedUnitsUnlockedYear3"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_hsdt_ReceivableForDigitalAssetsNumberOfRestrictedUnits_019f398f-c7e7-737b-aa29-903dcb53eb97" xlink:to="loc_hsdt_ReceivableForDigitalAssetsNumberOfRestrictedUnitsUnlockedYear3_019f398f-c7e7-75a1-af4c-3521fe5c4a18" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.heliusmedical.com/role/DIGITALASSETFUNDINVESTMENTScheduleofLockedFundSOLMonthlyUnlockDistributionDetails" xlink:type="simple" xlink:href="hsdt-20260630.xsd#DIGITALASSETFUNDINVESTMENTScheduleofLockedFundSOLMonthlyUnlockDistributionDetails"/>
  <link:calculationLink xlink:role="http://www.heliusmedical.com/role/DIGITALASSETFUNDINVESTMENTScheduleofLockedFundSOLMonthlyUnlockDistributionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_DigitalAssetsFundNumberOfRestrictedUnits_019feb7d-0694-7be5-8671-1f0e2d50b19f" xlink:href="hsdt-20260630.xsd#hsdt_DigitalAssetsFundNumberOfRestrictedUnits"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_DigitalAssetsFundNumberOfRestrictedUnitsUnlockedYear1_019feb7d-0694-76c6-acd4-e7e5a47b8aa2" xlink:href="hsdt-20260630.xsd#hsdt_DigitalAssetsFundNumberOfRestrictedUnitsUnlockedYear1"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_hsdt_DigitalAssetsFundNumberOfRestrictedUnits_019feb7d-0694-7be5-8671-1f0e2d50b19f" xlink:to="loc_hsdt_DigitalAssetsFundNumberOfRestrictedUnitsUnlockedYear1_019feb7d-0694-76c6-acd4-e7e5a47b8aa2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_DigitalAssetsFundNumberOfRestrictedUnitsUnlockedYear2_019feb7d-0694-7a3d-992a-4bd154dabfcc" xlink:href="hsdt-20260630.xsd#hsdt_DigitalAssetsFundNumberOfRestrictedUnitsUnlockedYear2"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_hsdt_DigitalAssetsFundNumberOfRestrictedUnits_019feb7d-0694-7be5-8671-1f0e2d50b19f" xlink:to="loc_hsdt_DigitalAssetsFundNumberOfRestrictedUnitsUnlockedYear2_019feb7d-0694-7a3d-992a-4bd154dabfcc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hsdt_DigitalAssetsFundNumberOfRestrictedUnitsUnlockedYear3_019feb7d-0694-7860-82e9-f03a757cc08f" xlink:href="hsdt-20260630.xsd#hsdt_DigitalAssetsFundNumberOfRestrictedUnitsUnlockedYear3"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_hsdt_DigitalAssetsFundNumberOfRestrictedUnits_019feb7d-0694-7be5-8671-1f0e2d50b19f" xlink:to="loc_hsdt_DigitalAssetsFundNumberOfRestrictedUnitsUnlockedYear3_019feb7d-0694-7860-82e9-f03a757cc08f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.heliusmedical.com/role/DERIVATIVESScheduleofGrossandNetAmountsDetails" xlink:type="simple" xlink:href="hsdt-20260630.xsd#DERIVATIVESScheduleofGrossandNetAmountsDetails"/>
  <link:calculationLink xlink:role="http://www.heliusmedical.com/role/DERIVATIVESScheduleofGrossandNetAmountsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueAfterOffsetAndDeductionSubjectToMasterNettingArrangement_019fda74-882d-70bf-ace7-fae19f2fc48f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityFairValueAfterOffsetAndDeductionSubjectToMasterNettingArrangement"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement_019fda74-882d-7968-a945-b610b356102b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeLiabilityFairValueAfterOffsetAndDeductionSubjectToMasterNettingArrangement_019fda74-882d-70bf-ace7-fae19f2fc48f" xlink:to="loc_us-gaap_DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement_019fda74-882d-7968-a945-b610b356102b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeCollateralRightToReclaimCash_019fda74-882d-7ec8-ad1d-5f6b3f49480f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeCollateralRightToReclaimCash"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeLiabilityFairValueAfterOffsetAndDeductionSubjectToMasterNettingArrangement_019fda74-882d-70bf-ace7-fae19f2fc48f" xlink:to="loc_us-gaap_DerivativeCollateralRightToReclaimCash_019fda74-882d-7ec8-ad1d-5f6b3f49480f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement_019fda74-6fc4-7323-894f-205d11f0a5d6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019fda74-6fc4-7d55-9625-4f5650cce1b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement_019fda74-6fc4-7323-894f-205d11f0a5d6" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019fda74-6fc4-7d55-9625-4f5650cce1b9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019fda74-6fc4-74eb-8d01-e2194c15741a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityFairValueGrossAsset"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement_019fda74-6fc4-7323-894f-205d11f0a5d6" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019fda74-6fc4-74eb-8d01-e2194c15741a" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
