This item caused a USB power surge and did not work upon initial try. I also plugged in the supplied USB/power cord and it still did not work. I have a 2004 Dell Inspiron 6oom that obviously does not supply enough power at the USB to run these portable drives. I have no intention of using it connected to the desk top as this is supposed to be portable and run off the laptop battery. I will return it and look for the largest flash-memory available.