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Toshiba MG03ACA400 4TB Enterprise SATA Hard Drive
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Amazon.com: Toshiba MG04ACA400N 4TB 64MB Cache 7200RPM SATA III 6.0Gb/s 3.5" Internal Enterprise NAS Hard Drive - 5 Year Warranty: Computers & Accessories
Amazon.com: Toshiba 4TB 3.5" SATA 6Gb/s 7200 RPM 128M Enterprise Hard Drive - MG04ACA400N: Computers & Accessories