- Supports four 3.5” SATA HDD\n- Built-in power supply and three 40mm fans\n- Compact and screw-less design for easy HDD installation\n- Plug and Play\n- Supports USB 3.0 maximum 5Gbps transfer speed\n- Supports eSATA maximum 3Gbps transfer speed\n- Configurable RAID function (RAID 0, 1, 3, 5, 10, Combine, Clear RAID)\n\nSilverStone created an incredible four bay 1U rackmount 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.