The USB 3.0 Enclosure that is even fast where there no USB 3.0 is around An external enclosure with a single HDD is nice to be taken to friends or clients. But what becomes of the great fast transfer speed if the friends or clients don''t have a computer capable of USB 3.0? The GT1660-SB3 is the solution to this problem. It has USB 3.0 and eSATA. That makes it the ideal device for multi-media data as there usually large data have to be transferred very fast.