You can transfer music, video, and more onto iPhone by syncing content from iTunes. You can sync all of your media, or you can select specific songs, videos, podcasts, and iTunes U collections.
Connect iPhone to your computer.
In iTunes, select iPhone in the sidebar.
On the Music, Movies, TV Shows, Podcasts, and iTunes U tabs, select the content you want to sync to iPhone. For example, you could set iTunes to sync selected music playlists and the three most recent episodes of your favorite video podcast.
Click Apply.
To set iTunes to sync iPod content and other info automatically, click the Summary tab and select “Automatically sync when this iPhone is connected.”
IMPORTANT: If you delete an item from iTunes, it will also be deleted from iPhone the next time you sync.
Only songs and videos encoded in formats that iPhone supports are transferred to iPhone. For information about which formats iPhone supports, see Song, Video, or Other Items Won’t Play.
If there are more songs in your iTunes library than can fit on your iPhone, iTunes offers to create a special playlist to sync with iPhone. iTunes fills the playlist with random selections from your library. You can add or delete songs from the playlist and sync again.
If you listen to part of a podcast or audiobook, your place in the story is included if you sync the content with iTunes. If you started listening to the story on iPhone, you can pick up where you left off using iTunes on your computer—or vice versa.
For more information about using iTunes to get music and other media onto your computer, see What You Need.