I have been having an issue with my hard drive latley (model number - st3000dm001-1ch1) in which if anything is downloaded to the drive it will dissapear and if i try to access the drive through file manager the whole computer will crash. I have noticed theough that it is only downloads to this drive that cause it ot crash/dissapear, copying files to or from it from other drives works fine. So far the only this I have tried is windows's built in error checking, which turned up fine. I have got quite a bit on the drive so I would like to avoid formating it, unless it will be a definite fix.