0001618563 2026-07-22 2026-07-22 0001618563 us-gaap:CommonClassAMember 2026-07-22 2026-07-22 0001618563 us-gaap:SeriesAPreferredStockMember 2026-07-22 2026-07-22 0001618563 us-gaap:SeriesBPreferredStockMember 2026-07-22 2026-07-22 false --12-31 0001618563 8-K 2026-07-22 National Storage Affiliates Trust MD 001-37351 93-2834996 2811 Internet Boulevard Frisco TX 75034 469 649-9486 false false false false Common Shares of Beneficial Interest, $0.01 par value per share NSA NYSE Series A Cumulative Redeemable Preferred Shares of Beneficial Interest, par value $0.01 per share NSA Pr A NYSE Series B Cumulative Redeemable Preferred Shares of Beneficial Interest, par value $0.01 per share NSA Pr B NYSE false