6 TB 3.5" 5400 RPM Serial ATA III NAS HDD Storage drive buffer size: 64 MB WD Red NAS hard drives are the essential solution for NAS applications. These drives are cool and quiet, and offer optimum compatibility in 24x7 NAS systems with up to eight bays.Storage for 1 to 8 bay NAS solutions - WD Redis designed specifically for NAS systems that have 1 to 8 drive bays in both 3.5-inch and 2.5-inch form factors. The drives are designed and extensively tested for compatibility in the unique 24x7 operating environment and for the demanding system requirements of home and small office NAS.NASware grows to 3.0 - WD Red now supports small NAS systems from 1 to 8 bays thanks to NASware 3.0, which further improves drive compatibility and reliability. At 48 TB of potential capacity in an 8 bay system, WD Red expands your NAS experience.Need help? We offer premium support - Every WD Red hard drive comes with our world-class professional support services including a premium dedicated 24/7 support