SilverStone created an incredible four bay 1U rack mount storage product in the RS431U. It connects to the PC via 5Gbps SuperSpeed USB 3.0 interface or 3Gbps eSATA interface which enables data transfer with maximum compatibility and stability. A full range of RAID modes (RAID 0, 1, 3, 5, 10, Combine, Clear RAID) is supported to provide the best security and performance for your hard drives. The RS431U offers a convenient and economical way to store data and is suitable for all users that require frequent backup and data manipulation.