Western Digital 18TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" - WD181KFGX

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