How to find and remove duplicates on iTunes: How to prevent iTunes 12 from importing duplicated music
iTunes no longer imports duplicate files if you drag and drop audio files to the iTunes library (you can force it to add the duplicate file by holding down the Option key while dragging the file). So you should no longer need to adjust anything.
However, it is a good idea to double check that iTunes is managing your music files correctly.
- Click on iTunes > Preferences.
- Click Advanced.
- Ensure that the Keep iTunes Media folder organized box had a tick in it.
- Ensure that the Copy files to iTunes Media Folder when adding to Library has a tick in it.
- Click Reset all dialog warnings.
- Click OK.
iTunes should now be set up to keep your music folder organised.
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