You may also try Duplicate Files Deleter. Find and manage duplicate files. Very nice GUI and easy to use. Its one of the best way to manage unnecessary duplicate files.
With Duplicate File Finder you can organize your media files and increase free disk space needed to enlarge your collection.
Below is a link for Cnet with several duplicate file cleaners.
Cnet has a link and review for Glary utilities that is a free download and it has a duplicate file finder.
I use Glary ...