Can anyone help me find an appropriate program for finding duplicate files, by their contents? I have a large number of photos, videos and audio, that over the years has been copied, moved, backed up, renamed, and re-encoded. I am now trying to remove all of this unnecessary duplication, as I think I can save a third of my current storage requirements. I want a program that will look at the video/photo and compare it to how other videos/photos look, and listen to the audio and compare it to how other audio files sound. I have been testing some software, so far I have tried: Duplicate Cleaner Pro (trial), which seems OK with audio, it only seems to compare the file size with videos, and it seems very hit and miss with photos. VisiPics seems to be OK with photos in the tests I have carried out. Do you guys know of any better programs? Free would be nice, but a small fee is acceptable.