hi, Thanks, I think it is a 3.5 because it does need power and it is SATA. Here is the thing...I didn't have microsoft office loaded onto my new computer before I tried to transfer the data. Is this why I cannot see anything that may have been transfered? I hooked it all up but then saw nothing transfered on my new computer. What could I be doing wrong. Also I did have a blue screen with a msg that said basically "STOP registry file failure, registry cannot load hive file blah blah blah" also "collecting data for crash dump initializing disk for crash dump......" also "windows failed to start. A recent hardware or software change is probably the problem. I dont know if my hard drive was damaged but a guy I spoke with said probably not that his got run over by his buick and it was fine. What am I doing wrong? Is there a way to see if there is any data on the hard drive in the external enclosure? I am really at a loss. I really appreciate all of your help.