Very fast program. Identified lots of duplicate numbers from within my thousands of image files. The problem is it does not actually so you the files, just the name or number. I know for a fact that many of the folder I have contain duplicate numbers yet they are different images. This is only somewhat helpful in that regard. I still have to manually explore every identified location to compare images. I don’t have time for that. I was hoping for a visual comparison to verify actual duplicates. Oh well it was free. It seems to work well for what it does. Just doesn’t meet my needs.