WD Red Plus WD40EFZX ( 4TB,5400 RPM,SATA 6 Gb/s, CMR,128 MB Cache, 3.5″ ) NAS Internal Hard Drive

Capacity: 4TB,
Form Factor: 3.5-Inch,
Connector/Interface: SATA,
Transfer Rate: Up to 175MB/s,
Disk Speed: 5400 RPM,
Recording Technology: CMR,
Cache Size: 128MB,
Endurance (TBW): N/A,
Dimensions: 146.99mm x 101.6mm x 26.11mm,
Weight: 570g,
Model Number: WD40EFZX,
Operating Temperature: 0°C to 65°C,
Non-Operating Temperature: -40°C to 70°C,
Features: Ideal for home offices, power users, small to medium businesses, and consumer/commercial NAS systems, for RAID-optimized NAS systems with up to 8 bays, rated for 180TB/year workload and 1M hours MTBF,
Compatibility: RAID-optimized NAS systems with up to 8 days.