WD Blue 4TB Desktop Hard Disk Drive - 5400 RPM SATA 6Gb/s 64MB Cache 3.5 Inch - WD40EZRZ
Western Digital WD Green WD40EZRX 4TB IntelliPower 64MB Cache SATA III 6.0Gb/s 3.5,WD Blue WD40EZRZ 4 TB 3.5,WD Blue 4TB Desktop Hard Disk Drive - 5400 RPM SATA 6Gb/s 64MB Cache 3.5 Inch - WD40EZRZ,Western Digital 4TB WD Blue PC Desktop Hard Drive, 3.5'' Internal CMR Hard Drive, 5400 RPM, 64MB Cache - WD40EZRZ