iTunes is the dominant music software on my clients computers and I am constantly asked about:
- Backing up iTunes to an external hard drive
- Restoring iTunes to a new computer
- Moving iTunes to a new computer
This link from Apple will help you and gives the answers whether you are on Windows or on a Ma
Don’t forget to de-authorise iTunes from computers you will no longer use and also remember you can de-authorise all your computers once a year if you forget.