I have a very similar issue, only mine is with a 4TB external drive, so each of the scans takes over 10 hours. Mine tends to freeze during recovery. I am in huge hurry for these files, but it is frustrating when it stops and I have to kill the app via task manager, then start again. I keep track of which files have already bee recovered by sorting them by file size. I noticed in the last couple of scans that it has found all the recoverable files by the first hour. The other day I had to reboot and stopped the scan and to my surprise, the results screen popped up. I am not sure if that is supposed to happen or if it was a fluke. I also can't remember if I hit the "X" or "Cancel" to stop it. I am also close enough to the end of a 10 hour scan that I don't want to try my luck.
