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TouchCopy can be used to backup your iPod or iPhone to your computer or an external drive.
If you have chosen to backup your iPod to your hard drive, TouchCopy will copy your music, videos, podcasts, tv shows and playlist to the iPod Content folder on your desktop. You can change the location on your hard drive where your iPod is backed up by using TouchCopy options.
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 back to your device.