If your computer has crashed, if you’ve purchased a new computer or if you’re plugging your iPod into your friend’s computer, when you sync your iPod, you risk losing all your music. However, by letting the computer know that the music on the iPod should transfer to the computer, you preserve your music, which can ameliorate the pain of your computer crash or make it easier to set up a new computer. Writer Bio

How to Sync an iPod Without Deleting the Music - 44