All your files are important, and I’d strongly recommend backing up everything. Some of you may back up your documents, but it’s best not to ignore an important part of your Mac’s files: Your iTunes media. There may be a lot of money in your iTunes library, and a lot of time spent building it. After all, iTunes holds music, videos, and audiobooks that you’ve bought, as well as any CDs or DVDs that you’ve ripped. While you can replace the latter, if you lose your files, it would take a long time to get everything back.
Now if you’re short on space, there are some iTunes media files that you don’t need to back up. Here’s an overview of how to back up your iTunes media files, and which ones you need to back up.
Read the rest of the article on The Mac Security Blog.