WD Red Pro 20TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 512MB Cache

WD Red Pro 20TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 512MB Cache is priced at £685.00 — stable over the last 30 days.

Price last checked: 18 Apr 2026, 16:52

• Available in capacities ranging from 2 to 22TB(1) | (1) 1GB = 1 billion bytes and 1TB = 1 trillion bytes. Actual user capacity may be less depending on operating environment.
• For RAID-optimized NAS systems with unlimited number of bays
• Rated for 550TB/yr workload rate(2) | (2) Annualized Workload Rate = TB transferred x (8760 / recorded power-on hours). The maximum rated workload is specified for operating at typical temperature of 40C. Workload Rate will vary depending on your hardware and software components and configurations.
• Designed to handle the demands of high-intensity 24x7 multi-user NAS environments
• Western Digital partners with a wide range of NAS system vendors for extensive testing to ensure compatibility with most NAS enclosures