How to back up your iTunes libraryHow do you back up your iTunes Library so you know all your music, movies, TV shows, and more are safe and sound? Like this!
There are a few ways to back up your iTunes library, including all your music, movies, TV shows, podcasts, and more. It's important to choose one, so you won't have to worry about your local copy getting lost or damaged. My music—at least for me—is one of those must-backup items; I don't want to have to manually re-build or re-buy thousands of tracks.
How to back up iTunes via Time Machine or another backup service
If you have Apple's Time Machine backup system enabled—or any other cloud- or system-based backup—your iTunes library should be automatically backed up by default. This way, if you ever need to restore, you can just pop back in Time Machine's History (or a past backup from CrashPlan or Carbon Copy Cloner, for example) to retrieve it.
How to back up and restore your Mac with Time Machine
How to choose and set up a backup plan for your Mac
...
Source:
How to back up your iTunes library
