
Hard Drive WD Red Plus WD40EFPX NASware 3.0 4TB 5.4K 256MB SATA III 3.5'',

Amazon.com: Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5,

Amazon.com: Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5,

Western Digital Red Plus (5400RPM, 3.5,

WD WD40EFPX Red Plus 4TB SATA Hard Drive for NAS w/ 5400RPM 6Gb/s 256MB Cache, Two Pack