When I plug my iPod into my PC at school, it asks to format the device. Does this mean that it will erase all my music? How can I set my iPod so that I can move files from the PC onto my iPod and then onto my Mac at home. Thanks in advance to everyone. mac 24.7.365

First of all, you aren't going to be able to transfer music between two different iTunes libraries no matter what I tell you after this, but if I understand correctly, you just want to use your iPod as a portable hard drive for the PC and Mac and as an music player paired with iTunes: Mac. To do this, you will need to first plug your iPod into a PC and run the iPod for Windows updater to update your iPod to a Windows version of the iPod firmware. This will erase all of your music from your iPod, but if your music is in iTunes on your Mac, it will sync next time you connect it to your Mac. Because iPod for Windows firmware formats the iPod as FAT32 (which is readable by both Windows and Mac) and not HFS+ (Mac only), an iPod formatted with the Windows firmware will work on both Mac and PC. Once you've updated your iPod on a PC, just plug it into your Mac, open iTunes (iTunes will recognize it and pair with it if your iPod is not already connected to another iTunes library), and all of your music will be synced to your iPod. You can now use your iPod for music with your iTunes library, but because Windows and your Mac can read FAT32, you can use it to move files between Macs and PCs as a portable firewire harddrive. Hope that helps, Morton