I've had luck with the open-source PhotoRec before. It scans a storage device for bits that match known file types (and it knows a lot, not just photo types as

I've had luck with the open-source PhotoRec before. It scans a storage device for bits that match known file types (and it knows a lot, not just photo types as the name implies), and saves them to a new location. I'd definitely give it a try before paying for expensive data-recovery.