Western Digital WD40EZRZ WD Blue SATA III 3.5,Western Digital Blue (5400 RPM, 3.5,Hard Drive Western Digital Green 4TB 5400RPM 64MB SATA III WD40EZRX 3.5 Inch | eBay,Western Digital Blue - 4TB 5400RPM SATA III 6Gb/s 64MB Cache 3.5,Western Digital 4TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 256 MB Cache, 3.5,