CloneSpy

CloneSpy can help you free up hard drive space by detecting and removing duplicate files. Duplicate files can have exactly the same contents regardless of their name, date, time and location.Moreover Clonespy is able to find files that are not exactly identical, but have the same filename. Perhaps you have different versions of a file and you want to find all of them and remove the older versions. Furthermore Clonespy can find zero length files. That are files that do not have any content. Altogether with CloneSpy you can process files which - are duplicates - have the same file names - are duplicates and have the same file names - are zero bytes long.

CloneSpy offers you a complex mechanism to decide which files of the duplicate or same name files should be deleted. But it is also possible to leave this decision to the user. 

You have the option to decide what you want to do with the found duplicates, CloneSpy shows you the details of each file (and it`s proposed duplicate) and allows you to either keep, move or delete.

With CloneSpy you can build checksum files from files on CDs (or even on hard drives, etc.) and use them to check if you have these files already on your system. The checksum files will prevent you from playing DJ every time you search for duplicates.