I just purchased an amazon basic 3.5 hdd enclosure for my 3 tb Toshiba 3.5 hdd. It seems to not be detected by my system or third party programs as well. I'm suspecting that it may be due to the power going into the hard drive. When i have it connected to my laptop and and the wall outlet the hard drive powers on. It makes a certain sound as well. The sound is essentially the hard drive starting up and powering up, then it halts then weakens and then reapeats over and over. During this as well there is a distinct double clicking noise. My laptop does recognize that its an amazon basics hard drive enclosure, but there is no partition or anything showing up for the actual Toshiba hard drive.