Internal Hard Disk Drives

Western Digital WD Ultrastar 16TB 3.5' Enterprise HDD SATA 512MB 7200RPM 512E SE DC HC550 24x7 Server 2.5mil hrs MTBF 5yrs WUH721816ALE6L4

Western Digital WD Ultrastar 18TB 3.5' SAS HC555 Data Center HDD Storage

Western Digital WD Ultrastar DC HC560 20TB 3.5' SATA 7200 RPM Cache 512MB 5-year limited warranty WUH722020BLE6L4 0F38785 (Base SE)

Western Digital WD Ultrastar DC HC590 Data Center Hard Drive - 26TB 3.5' SATA 512MB 7200RPM 5yrs wty WUH722626ALE6L4

Western Digital WD11PURZ WD Purple 1TB 3.5' Surveillance HDD 5400RPM 64MB SATA3 110MB/s 3yrs limited warranty