If you will be in the situation when your computer got formated or simply change a new computer, then the first thing come in your mind will be how to transfer and backup all favourite music, video, playlists, pictures and all other important data from your iPod/iPhone back to computer and iTunes.
The answer is this
iPhone/iPod/iTouch to Computer Transfer
The following are easy steps that shows you how to move music and other files from iPod/iPhone to computer/iTunes.
Free Download it to your computer first.
Step 1: After your iPhone/iPod/iTouch connected to pc, Launch the program you will see the right UI. Normally, the program will search the device automatically. If the device is enabled, the files (songs/movies/photos) will be shown in the list.

Step 2: Choose the list and files you want to transfer, and then Click the Export button.

Step 3: After you clicking the Export button, the following window will pop up, you can choose transferring to computer or iTunes directly. You can set the output folder at Advanced->Options before transferring..
Transfer music from iPod to computer, or transfer songs form iPod to iTunes.

Step 4: When the transferring finished, the following window will pop up. It shows that how many files have been done. You can click the OK button to view the output files.

Note this backup software supports all iPod types, including iPod Touch and iPhone. It can Easily and quickly copy your songs, videos, photos, playlists, podcasts and more from your iTouch/iPhone/iPod to any folder on your computer and to iTunes.
Free Download it to now.
Or
Get the full version to make it yours now.
Hope these can help you.
Learn more details about this
iPhone/iPod/iTouch to Computer Transfer here.