How to Sync Your iPhone With Your Computer
Regularly syncing your iPhone with your personal computer is important to your iPhone experience. An iPhone sync backs up all your important iPhone information. When you sync your iPhone, iTunes automatically creates a backup in case you need to restore your device. You also use the iTunes sync to add music, photos, movies and TV shows to your iPhone.
Plug your iPhone into your computer using your iPhone USB cord.
Open iTunes on your personal computer if it does not automatically start.
Select your iPhone under the "Devices" header. This is located in the left navigation pane in iTunes.
Press each of the tabs at the top of iTunes. You'll see Summary, Info, Music, TV Shows, Movies, Books & Photos. Set up your individual sync settings.
Press the "Sync" button in the bottom right of the "Summary" page to sync your iPhone with your computer.