I have a nearly full 2TB hard drive full of movies, pictures, and music that I was allowing my roommate to borrow. As he was handing it back to me he dropped it from standing height. When I plug it into the computer, it powers and spins up. However, it is not recognized under My Computer. It does appear under Device Manager > Disk Drives, but will not show up under Disk Management and is not given a letter drive. Can anything be done other than sending it to a professional recovery service? Thanks.