Western Digital 2TB SATA 3.5 inch WD Purple 256 Cache

20-pack 22TB SATA Purple Pro 3.5 inch

Western Digital Part# WD221PURP-20PK

Hard Drives - Internal – Hard Drive - No Wireless LAN - SATA - Purple - 3.5" Form Factor - 22 TB Storage Capacity

20-pack 18TB Purple Pro SATA 512MB 3.5LP

Western Digital Part# WD181PURP-20PK

Hard Drives - Internal – Hard Drive - 512 MB Buffer - No Wireless LAN - Purple Pro - SATA - SATA/600 - 7200 Spindle Speed (rpm) - Restriction of Hazardous Substances (RoHS) - Internal - 3.5" Form Factor - Server - Video ...