I want to back up with iTunes

Ünalll wrote:

I want to back up with itunes. I have no information about itunes, I wonder if I have itunes? paid?

iTunes is a free app. It is built in to Macs, and you can download it for Windows from the Microsoft Store or http://itunes.com.

Here is more information about backups→How to back up your iPhone, iPad, and iPod touch - Apple Support

Follow the directions in the link Lawrence provided above. The words that are in blue are a clickable link. They will take you to the complete instructions.