Sep 11, 2017 Back up your iTunes Media folder. While rebuilding the library doesn’t affect your media files, it’s best to be safe. Quit iTunes, then find your iTunes folder. If you’re on a Mac, it’ll be in the Music folder in your home folder (that’s the one with the house icon and your user name). How to Rebuild iTunes Library on Windows/Mac Computer. Shut down iTunes. Go to iTunes folder. The location of iTunes folder vary from computers. On windows 7/8/10, the location is, C: Users Your Computer Username My. In iTunes folder, click “Previous iTunes Libraries”, and copy the latest. Ask the iTunes Guy: Rebuilding an iTunes library, dealing with duplicate playlists. Check this setting to tell iTunes to create the iTunes Library.xml file. While Apple may have changed this. How to Rebuild iTunes Library. Step 1 – Run iCareFone and then get your iOS device connected with the PC. Hit on 'File Manager' from the main interface. Step 2 – Choose 'Music' now from the list of file types and your music list will be on the screen. Step 3 – Pick out the preferred music and hit on.