Amazon.com: Western Digital 4TB WD Blue PC Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5
Western Digital 4TB WD Blue PC Desktop Hard Drive, 3.5'' Internal CMR Hard Drive, 5400 RPM, 64MB Cache - WD40EZRZ,WD40EZRZ-00WN9B0 - Western Digital 4TB 5400RPM SATA 6Gb/s 3.5-in HDD,Amazon.com: Western Digital 4TB WD Blue PC Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5,WD Blue 4TB PC Hard Drive - 5400 RPM Class, SATA 6 Gb/s, 64 MB Cache, 3.5in - WD40EZRZ (Renewed)