WD Red Pro WD121KFBX 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive

Available in capacities ranging from 2 to 22TB with support for NAS systems with up to 24 bays
Supports up to 300TB/year workload rate
Enhanced reliability with 3D Active Balance™ Plus technology and error recovery controls with NASware™ 3.0 technology
Extended drive testing to ensure each drive is tested for extended reliable operation
5-year limited warranty