Thanks for posting Cyber, you emphasis my point very clearly. In the case of very large partition/volumes it will take way way too long for chkdsk to try and repair. I would have tried to move all of the data over before trying a chkdsk, just as a precaution. I personally couldn't have waited a week and aborted the process, which chkdsk will often corrupt a disk even more if aborted before completed. Does S.M.A.R.T say anything (the tool I use currently is Crystaldiskinfo)? Perhaps not if the drive is connected via USB. 5gb of bad data means that the drive has a LOT of bad sectors. Likely more than it had spares for and you only started noticing problems when it ran out. How large was the drive? I try to keep large drives partitioned to a max of 500gb, makes it much easier to error check later. If you can't get smart data off of the drive, it may be interesting to pull it and install directly into a desktop or eSATA enclosure. Then take a look at the SMART data. But I would only try this after you have got all the data you can off of the drive. As for copying you might try fee file sync, open source and works really well for copying. It also has logging so that if you ignore the popups (which I usually do in the settings) you have a full log of what files failed to copy. And usually lists the files as still needing to be copied if they failed, but the log will give more information as to why they failed. Another option is bad block copy, it will copy a file even if there are problems. However I would use something else first to identify which ones are corrupt.