I've got a Kingston SSDs that I have externally attached via USB 3.0. The enclosure has a Y cable for extra power. I have VMWare images on the SSDs so I can run demos. Everything starts up fine but after about 15 minutes I get an error message from VWWare saying that my E:\ drive is disconnected. The E:\ drive is my external SSD. My curser freezes and does not seem to recover. Not sure what's going on. I have a Lenovo W530 laptop running Win 7 64 bit. My BIOS is set for USB 3.0 to be auto. My old Lenovo W510 does not seem to have this issue. One last thing, when I run the VMWare images on my internal HDD, I don't get a problem.