When I try to access a folder in one of my hard drives, I get an error message saying the drive is not formatted. The data must be corrupted. I have tried about 10 different data recovery tools, the free ones are useless, they just detect deleted data. The ones that detect the corrupted files cost over £100 to register the product in order to recover the data. I have tried deleting the folder in order to recover it again with one of the free ones, but i can't delete it. Does anyone know of a decent tool I can use to recover the data?