Western Digital has 18TB Western Digital WD Red Pro 3.5″ 7200 RPM NAS Internal Hard Drive (WD181KFGX) on sale 2 for $549.98. Shipping is free.

Note: Valid only for 18TB (WD181KFGX), select from the dropdown menu. Must order 2 to get deal price, otherwise a single drive is $349.99.

Features:

• Transfer Rate: up to 272MB/s
• Designed with CMR technology for medium or large-sized businesses in RAID-optimized NAS systems with up to 24 bays. Perfect for archiving, sharing and handling high-intensity workloads.