Connect two hotswappable 3.5" SATA III hard drives to your computer externally through USB 3.0 or eSATA Support SATA III (6 Gbps) and UASP for optimal performance. Hardware RAID (01BIGJBOD) Trayless HDD slots with locks external 2bay Hard Drive Enclosure. Repurpose an existing 3.5" SATA Hard Drive as an external Enclosure to connect to your computer.