Connect two hot swappable 35 sata iii hard drives to your computer externally through usb 30 with uasp or esata the s352bu33rer 2 bay raid enclosure lets you build an external raid array with two 35 sata hard drives and connect to your computer through usb 30 or esata for fast performance and efficient data transfers the enclosure supports sata iii transfer speeds up to 6 gbps when connected through esata the versatile raid enclosure can also be connected through usb 30 with su