Click the "Backup" button on the TouchCopy Control Panel. The Backup button is only available for registered TouchCopy users.
Select where you want your iPod content to be placed: In a folder on your computer, the location of which is specified in the Options Window, or directly into your existing iTunes library.
Click "Continue" and TouchCopy gets to work. TouchCopy will copy all of the following items to the destination you have specified...
Restoring your iTunes library from a backup
To restore your iTunes library from a backup, open iTunes, select the File tab and then click on Add folder to library. From there navigate to the location on your computer where your backup is stored and click on OK. Wait for iTunes to finish importing your music.
Then, connect your iPod or iPhone and use iTunes to re-sync it which will reload your music to your device.