Detwinner

Key features of Detwinner:
- flexible search options: create file masks to search or ignore, specify ranges of file size or file write date, skip hidden and system files;
- specific folders protection: exclude system or backup folders from scanning;
- search presets: customize standard presets for audio, video, image files, photos and documents, or create your own ones;
- duplicate files preview: see what you're deleting before it's too late;
- smart selection: select the oldest duplicate files, files with longest path or name;
- regular expressions selection: select duplicate files with name or path that match sophisticated rules;
- safe deletion: move duplicate files into recycle bin or backup folder, or delete them permanently.