Hey all. I have a 200 gb external HDD that I have been using for quite some time now. It has worked fine all the time up until now. When I plug the device into my computer, the drive's power light goes on, and I can dear it humming, but it is not recognized by the computer. When I go into my computer, all that shows up is my C drive. I have also tried the drive in a Mac, to no avail. Im an extremely confused here. Thanks in advance, Ace.