Total Commander match duplicates and merge
Total Commander matches files and give a nice neat list. I'd try a small folder example though. Duplicate file finders like Duplicate FREE Edition can give you a sample of how confusing it is to read those. Total Commander has a forum, so you can ask them about the merge. I used it yesterday, but I didn't merge; they do have 'arrow right' so I guess that is merge, too. TC uses plug-ins, is free, and you register, if you want to. Try SyncbackSE, 2brightsparks.com, for the MD5 hash so you won't have to guess the search, although TC has a plug-in for that too. Let me know if this works; I can't do it because my computer is unstable from a virus.