How to Change a Format From iPod to Windows
- 1). Open the iTunes application on your Mac computer.
- 2). Connect your iPod to the Mac computer using the iPod USB transfer cable.
- 3). Click on the name of your iPod in the "Devices" list on the left side of the iTunes window.
- 4). Go to the "Summary" tab at the top of the iPod configuration page.
- 5). Click on the "Restore" button and choose the first restoring option when prompted.
- 6). Wait for the restoring process to finish and then eject the iPod from the Mac computer.
- 7). Connect the iPod to a PC running the Windows operating system. The iTunes program will automatically open, reformat the iPod's hard drive and then begin syncing with your iTunes library.
Source...