How to back up my iPhone using iTunes
1. On the computer, start iTunes.
2. Connect your iPhone to the computer. In iTunes, select your iPhone.
3. Click Back Up Now.
If required, enter your passcode.
4. Wait while the iPhone is backed up.
5. Your iPhone has been backed up to iTunes.
Note: Screens, functions and options shown in this guide are for reference only and may only be applicable to certain models of phone.