Western Digital WD Red Pro 4TB NAS SATA 3.5" Internal HDD, 7200 RPM, 256MB Cache, CMR - WD4005FFBX

Built for creative professionals, medium-to-large businesses and commercial/enterprise NAS deployments, the Western Digital WD Red Pro 4TB delivers business-class performance and endurance. Engineered specifically for RAID-optimized NAS systems, it supports configurations with an unlimited number of bays. This drive is rated for 550TB/year workloads and provides up to 2.5M hours MTBF for the reliability required in multi-drive storage environments.You may also like WD5001AALS-00J7B1 Hard Drive PCB (2061-701567-400 AE / 2060-701567-000 REV A) - WD SATA 3.5.