AcuteFinder will help you to find duplicate files on your system and delete them. It's simple, easy, and safe to use, and costs as little as $14 to buy.

AcuteFinder not only takes into account items like file name, size or timestamp, but reads through possible duplicates and calculates their checksums. This way, it is guaranteed that the files are really identical, and you can delete the extra copies with full confidence.

AcuteFinder can find files that have different names, like "my.doc" and "Copy of my.doc". Basically, if files are of the same size and have the same checksum, they are considered identical. AcuteFinder uses by default CRC32, a 32-bit checksum, but you can choose to use MD5 hash (128-bit) as a final step in file comparison for even more accuracy.