WD Red Pro WD4001FFSX 4TB SATA 3.5 inch Internal Hard Drive
WD Red Pro 4TB 7200 RPM 3.5,Western Digital WD Green WD40EZRX 4TB IntelliPower 64MB Cache SATA III 6.0Gb/s 3.5,WD Red Pro WD4001FFSX 4TB SATA 3.5 inch Internal Hard Drive,WD Red WD40EFRX 4 TB 3.5