Thumb Score: +44 Updated: This popular deal is still available. Western Digital has 20TB Western Digital WD Red Pro 3.5" 7200 RPM NAS Internal Hard Drive (WD201KFGX) on sale 2 for $599.98. Shipping is free. Note: Valid only for 20TB (WD201KFGX), select from the dropdown menu. Must order 2 to get deal price, otherwise a single drive is $329.99.