This portable, cable-style adapter makes it easy to swap between hard drives without having to install your drives in an enclosure, and features a lightweightdesign with no external power required, for easy storage in a laptop bag or carrying case. Improved Performance with UASP UASP is supported in Windows 8, Mac OSX (10.8 or above), and Linux. In testing, UASP performs with a 70% faster read speed and 40% faster write speed over traditional USB 3.0 at peak performance.