Western Digital WD 4TB Red Pro NAS SATA HDD Internal Hard Drive HDD-WD4005FFBX
Western Digital 4TB WD Red Pro NAS SATA HDD, 3.5" Internal Hard Drive HDD, 7200 RPM, 256MB Cache, CMR - WD4005FFBX. For RAID-optimized NAS systems with an unlimited number of bays. RAID-optimized NAS systems with unlimited # of bays.