Western Digital - WD241KFGX-20PK - WD Red Pro WD241KFGX 24 TB Hard Drive - 3.5" Internal - SATA - Conventional Magnetic Recording (CMR Method - NAS, Desktop PC Device Supported - 7200rpm - 550 TB TBW - 5 Year Warranty - 20 PackITEM #: 27565385 Enterprise class hard drives engineered to deliver high performance and reliability to commercial and enterprise NAS environments. WD Red Pro drives are engineered to handle high intensity workloads in 247 multi user commercial and enterprise NAS environments. WD Red Pro drives deliver the performance, scalability and dependability businesses require to store, share and collaborate on large amounts of data in multi bay RAID optimized