how do I copy my entire itunes library on to a cd
How do I burn a copy of my entire I-tunes library on to a CD
Archived - How to back up your media in iTunes
If you use a regular CD, then you will need a lot (depending on how many songs, videos, or apps) I recommend using DVDs so that way, you can store a lot. (CDs hold up to 800MB or 80min.; DVDs hold up to 4.7GB or 120 min.)