Set up sync with computer
Keep your stuff with you – with the Zune PC app, you can sync your music, videos, and photos between your phone and your compatible computer. You can also back up and update your phone with the latest software, to improve performance and get new features.
Download and install the latest version of Zune on your PC from www.zune.net/ .
If you're using an Apple Mac, download Windows Phone 7 Connector for Mac from the Mac App Store.
Make sure your phone is not locked with a security code.
Connect your phone to your computer with a compatible USB cable, and follow the instructions shown on your computer.
To change Zune sync settings, on your computer, select SETTINGS.
If you have previously used another app, such as Nokia Ovi Suite or Nokia Suite, to sync your files between your phone and computer, you can set Zune to sync files to the same folders you have used earlier, and have your music and other content easily synced to your new phone.