AJ opened up a laptop he hadn't used in awhile and all of his music and pictures were corrupted. A popup actually said the disk couldn't be read, and must be formatted. He tried to recover it. Why did it become corrupt? Leo says that hard drives die, and that's why you need a 3-2-1 backup strategy. 3 copies, on two different formats, with one off site.
Leo recommends using SpinRite to repair the hard drive. It does a low level recovery by moving data off damaged sectors, and it won't stop until it does. It could be his computer's operating system as well, so he should try plugging the hard drive into another computer.