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DUFF is (will be) a tool for Windows used to find and process duplicate files on a computer file system and/or network.
It will have numerous built-in and plugin-based file comparison layers, duplicate markers, and fileset processers.
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Duplicate File FindersLicense
GNU General Public License version 2.0 (GPLv2)Follow DUFF: DUplicate File Finder
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User Reviews
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No good for me, just crashed all the time. 1) Didn't find duplicates - told it file extensions had to be different and was simply trying to find duplicates of music files - like some are FLAC, some MP3, so I could remove the MP3 files - but despite this it brought up no duplicates just a load of files that were not duplicates! All completely different filenames. 2) Tried to clear the list - it wouldn't - closed and restarted, tried again and this time it just crashed.
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Thank you very much for the free open source program!
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No documentation at all. Several unclear pages with partly dimmed settings for search criterias. This is not all, not in any way intuitive user interface, very confusing. I did not dare this to DELETE any duplicates it found. Application crashed three times when closing on Win-XP machine.
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While searching, crashes on my Windows 8.1 64bits
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Great way to find duplicates, almost irrespective of exactly how you define the meaning of duplicate and which dupes to care about.