WD Red WD20EFRX 2 TB 3.5" Internal Hard Drive - SATA - 64 MB Buffer - 20 Pack - WD Red WD20EFRX 2 TB 3.5" Internal Hard Drive - WD Red WD20EFRX 2 TB 3.5" Internal Hard Drive - SATA - 64 MB Buffer - 20 Pack - 20PK 2TB INTELLIPOWER 64MB 3.5IN WD RED SATA 6GB/S - Marketing Info: - WD Red™NAS Hard Drives - WD Red is the only hard drive designed for NAS systems that have 1-5 drive bays. The drives are designed and extensively tested for compatibility in the unique 24x7 operating environment and demanding system requirements of home and small office NAS. - Item-Type: - Hard Drive. . Item-Part-No#: WD20EFRX-20PK. Manufacturer Warranty: 3 Year - Western Digital Corporation - WD Red WD20EFRX 2 TB 3.5" Internal Hard Drive - SATA - 64 MB Buffer - 20 Pack -