Internal Hard Drives

WD 3.5", 4TB, SATA3, Red Pro NAS Hard Drive, 7200RPM, 256MB Cache, OEM

WD 3.5", 4TB, SATA3, Red Plus NAS Hard Drive, 5400RPM, 256MB Cache, OEM

WD 3.5", 4TB, SATA3, Purple Surveillance Hard Drive, 256MB Cache, OEM

Seagate 3.5", 4TB, SATA3, SkyHawk Surveillance Hard Drive, 256MB Cache, 16 Drive Bays Supported, 24/7, CMR, OEM

WD 3.5", 4TB, SATA3, Blue Series Hard Drive, 5400RPM, 256MB Cache, OEM

Seagate 3.5", 4TB, SATA3, BarraCuda Hard Drive, 5400RPM, 256MB Cache, OEM