Q: Backup using itune

Hello Jeff,

Thank you for participating in the Apple Support Communities.

To authorize a computer in iTunes, choose Store > Authorize This Computer from the top menu.

If you're using Windows and don't see the menu, follow this tip first:

If you're using a Windows PC, and you don't see the menu bar, press the Control and B keys on your keyboard or follow these directions to show the menu bar. In earlier versions of iTunes, you can access this option from the Advanced menu.

You can find this information and more help with iTunes Authorization here:

Authorize your computer in iTunes - Apple Support

Sincerely,

Jeremy