iPod is basically a big hard drives and the hard drive in your iPod needs to be formatted. We know formatting is essentially the process of prepping the drive to talk to the computer it connects to.
I believe there are many people searching for the method to reformat their iPod, and here we will show you how to reformat your iPod in with iTunes in following content.
Notes: Before you even think about reformatting an iPod, make double sure that you’ve got your iTunes library backed up, because formatting the iPod means erasing everything on it and reloading it with songs, movies, etc.
Step 1: Connect your iPod to your computer and sync it with iTunes.
Step 2: Open the iPod management screen by clicking its icon on the left side of the iTunes window.
Step 3: Click on the tab labeled "Summary".

Steps 4: Look for the button labeled "Restore" beneath the "Check for Update" button. Click "Yes" when iTunes asks you if you're sure you want to restore the iPod.
Steps 5: Choose "Use Newest Version" when you are prompted for restore options - this will restore your iPod to the newest iPod software available. Then wait for the computer to restore the iPod.
Tips: I would like to remind you again, reset your iPod will erase everything from your iPod. If you want, here we recommend you an easy way to Backup Content from iPod to Mac with iPod to Mac Transfer. It is a great iPod Transfer software that can help you backup files from iPod to Mac quickly and safely.
Related Resources: Free iPod to Mac Transfer Software, How to Connect iPod to TV