Here's what you need to do: -Plug your iPod into your computer -In iTunes, click on your iPod, it will bring up a picture of your iPod and the categories "iPod", "Version", and "Options" -Under "Options", make it so that the box for "Manually manage music and videos" is checked. You will then have to manually drag songs to your iPod when you want to add them, but you will be able to get music from other people's computers easily. When this box is unchecked, it will automatically delete any songs that are on your iPod, but not in your iTunes.