tested on a case Lian li E-sata Ex-20, I do not exceed 40MB / s (about 54 large file) on a USB3 Port Alienware laptop with SSD .... while the case contains 2 disk raid 7200 1 .... is as much as my USB2 port .... so no interest if it is to convert a box that would have no USB or plug to fill a Esata box on a computer that is not equipped.