If you sync your iPod there is a risk of losing all your music and collections. If you acquire new a latest PC or if you're plugging your iPod into your associate’s computer or if your computer has given up the ghost while sync your iPod, you are 95 percent at risk losing all your music. But by taking simple care and steps you can avoid losing your collection and music.
Start iTunes from list or Application Folder by clicking on "Start".
Now its time to plug you iPod to your computer with the help of USB data cable. This data cable is provided to you with iPod box. Its safer and good to use original data cable. But if you don't have the original one you can use any from market.
Click the icon for your iPod located on the left side of iTunes. If your computer displays an error message asking you to reformat your iPod, your iPod won't work in Windows as it is formatted for Mac computers; you may still transfer the music, but you will need to download a third-party application to do so.
Scroll down to Options and click the “Enable disk use” choice.
Use "My Computer" to view your iPod drive.
Click the "Start" button, "Control Panel," and then "Appearance and Personalization." Select "Folder Options" and then the View tab. Under the "Advanced Settings," choose the option to "Show hidden files, folders, and drives," and then the "OK" button. This makes the hidden files and folders on the iPod available for viewing.
On the iPod drive, select "iPod_Controls," and then "Music." Select all the folders and drag them to the music folder on the hard drive on your computer. The transfer proces may take some time if you're transferring a large number of music files.
Select the iPod folders again, right-click them and select "Properties." De-select the option to hide the files and folders, then close the window.
In iTunes, sync your iPod. This cleans up the titles of your music on your computer and properly imports the files into your computer.
Please not that above procedure doesn't work with the iPod Touch.