I just tried it with a music folder and found it kind of useless. When I searched for exact copies, it found nothing. When I searched for similar, it found all the duplicates. And I know they were duplicates because it actually plays the files for you as you arrow through them. However, there were a few big problems. I couldn't tell which files were checked. It didn't give the full file path. But the worst thing is that it wouldn't let me delete the duplicates. Apparently, if you search for similar rather than identical files, you can't delete them unless you pay $40 for the pro version.