I left my computer for half an hour turned on with the USB in the drive, when i came back all my files are corrupted and the disk is now full. Is there anyway to get these file back?!
I assume you mean you have a USB thumb drive. It sounds to me like you have a bad drive. If you didn't buy from a reputable store but decided to buy cheaper through E-Bay your drive may even be a cheap one prone to failure.
There's a lot of fake USB drives, camera cards and more being manufactured overseas.
If your USB drive is corrupted I doubt you can get your data back. You can try formatting it but I don't know if that will help.