I have a blended music library with both “mp3” files and “m4a” files. Many of the music directories and specific album sub directories actually include what appears to duplicate music song files differing only by the file extension of both mp3 and m4a files.
For those directories that contain the same songs with both extensions, how can I use Windows 7 and/or a batch file command to search through my entire music directory (and respective sub directories) and delete only those m4a files where the same song file exists in the mp3 file format in the same music library folder as well?
My music library contains about 75,000 songs if I ignore the duplicate m4a files of the same song that may exist in the same music folder(s) of various albums.
However, right now, with no regard to specific file extension types, my directory appears to have over 100,000 songs (where obviously 25,000 of these songs are duplicates that account for these aforementioned file formats of the same song(s) coexisting in their given respective music album folder and/or music sub directory(ies)).
What operation or command can I use to safely scan my music library and remove extraneous “m4a” song files where the preferred “mp3” files already exist?...While KEEPING those m4a files where NO same song mp3 files already exist? I also need step by step instructions on how to setup and start any batch files that achieves the stated goal above. Thanks so much Guys!