I have a Western Digital Elements 1TB external HD, it's been used for the past six years to backup two MacBook Pros with Time Machine. It sits on a shelf, it's never been moved........until the other day when I had to carry it to another room, now when I attach it I get the the message, 'The disk you inserted was not readable by this computer'. It's doesn't appear on the desktop. I can 'see it' with DiskUtility but only the disc not the contents.
This doesn't feel good, any suggestions as to what I can do?