Need to add devices to Itunes account

Greetings Granny Kate 47,

The following article explains how to associate a device with an Apple ID, use the information in this article - View and remove associated devices in iTunes.

Specifically -

When you use certain iTunes Store features on your iPhone, iPad, iPod touch, or computer, your iOS device or computer is automatically associated with your Apple ID in iTunes account settings. These features include:

• Turning on iCloud Music Library.
• Downloading past purchases you made in the iTunes Store, App Store, iBooks Store, or Mac App Store.
• Turning on Automatic Downloads.
• Turning on Family Sharing.
• Subscribing to iTunes Match.

Note that this applies only to computers and iOS devices such as iPhones. An iPod nano is not capable of any of these actions and thus can not be associated with an Apple ID.

Thanks for using Apple Support Communities.

Be well.