He backed up his data to an external HD, then accidentally deleted it. (he doesn't know how many GB but said it was 50,000 files and from what R-Studio says its at least 30GB)
The biggest mistake was then copying some more files over to the external. I think some of the deleted ones got overwritten. (about 20GB was copyed onto the external again)
Since this was a brand new drive I told him it would be a cleaner recovery from it rather than his internal that was reformatted and reinstalled OS onto.
*edit* That syncing program has run for 1.5 hours and scanned 2.5 million files so far @ 8GB worth. If it takes 6-8 hours total to prep for the sync, how long do you think the actually copy process will take?