unstoppable copier

Infopackets Reader Phoebe A. writes: " Dear Dennis, Today I tried to free up some space on my C drive by moving files over to my external hard drive, but Windows gave me an error message, stating that 'Error during copy: the request could not be ... performed because of an I/O device error'. I've also tried using 'TeraCopy' to copy files over, but it keeps freezing on the same files. Can you help? " My response: If you receive an error that says "the request could not be performed because of an I/O device error" when trying to copy or move a file, that usually (but not always) indicates bad ... (view more)