Connect two 35 sata iii hard drives to your computer through usb 30 with uasp in a raid array and charge or connect usb devices with the built in 2 port usb 30 fast charge hub the s352bu33hr 2 bay raid enclosure lets you build an external raid array using two 35 sata hard drives and add it to your computer through usb 30 for optimal performance from your sata iii drives the external raid enclosure supports a uasp enabled usb 30 host connection which performs up to 70 faster tha