12TB WD Red Pro WD121KFBX, 3.5" NAS HDD, SATA III - 6Gb/s, 7200rpm, 256MB Cache,
12TB WD Red Pro WD121KFBX, 3.5" NAS HDD, SATA III - 6Gb/s, 7200rpm, 256MB Cache, Shock Sensor, NCQ. MPN WD121KFBX. Model WD121KFBX. WD Red Pro 12TB 3.5" SATA3 NAS HDD/Hard Drive 7200rpm. Desktop drives aren't purpose-built for NAS.