How do I backup the data on my iPhone?
1. Download iTunes on your computer.
Download iTunes or, if you already have it, make sure you have the latest version installed at this link: http://www.apple.com/itunes/download/.
2. Back up your data.
1. Plug your phone into your computer using the cable from your iPhone charger. iTunes should launch automatically and begin backing up your phone.
a. If the backup does not begin automatically, open iTunes and click the iPhone icon in the upper-left section of the window. In Summary Settings, open Manually Back Up and Restore, then select Back Up Now.
2. Wait for the backup to complete. If you haven’t backed up in a while (or ever), the process may take 30 minutes or more.