It just works. What more can I ask for. I used it with SATA SSD. As I said, it works. The drive I used was unformatted and I was able to give it a drive letter and format it by connecting it to this cable. The cables are short, but what more could you ask for. The speed corresponds to the speed of USB 2.0. I have 30MB/s. with a SATA SSD in a laptop being converted to a SATA SSD. HD slows down. This is USB 2.0. Therefore you need external power supply. USB 3.0 is not required. You can use it with 3.5 SATA HD. That's all.