As we know, we can back up data on iPhone, iPad, or iPod touch in iTunes.
1. Open iTunes and connect your device to your computer.
2. Tap your device icon in iTunes, in Summary tab, find Backups and click “Back Up Now”.
3. After the backup process ends, you can check your backup file in iTunes Preferences > Devices. You will see the name of your device with the date and time that iTunes created the backup.
An iTunes backup includes almost all of your device’s data and settings.
--Camera taken, screen shots, images saved, wallpapers, etc.
--Videos, Movies, Music, Ringtones, etc.
--iMessage, SMS, Voice Message
--App settings, preferences, data, documents , etc.
--Game Center and Mail account (messages are not backed up)
--Home screen arrangements, etc.
--Network settings (Wi-Fi hotspots, VPN settings, network preferences)
--Nike + iPod saved workouts and settings
--Calendar accounts, events, etc.
-Browse history, browse cache, mail cache/message/attachments, temp files, etc.
Your iTunes backup does not include: