iPod nano

To add to what Lissy_12 has mentioned, since the only way to add music to an iPod nano has been to use iTunes (or Finder on later MacOS), the music should still be in your iTunes library on your computer.

Do you still have the computer that you used originally to add the music to the iPod? If so, use that. If you removed iTunes, the music will still be on your computer, probably in the Music Folder. If you no longer have that computer, did you ever back up your music onto another drive? If so, use that.

If you do not have a backup, you can either buy an programme that will recover the music from the iPod so that you can use it again, or go back to your original source:

• • if it is music from CDs, find the CDs and re-rip them into your current iTunes Library
  • if you purchased the music in digital form (MP3 for example), go to your account in theb store you bought them form and re-download them

For more information on programmes that recover music from iPods, see the tip from fellow user turingtest2: Recover your iTunes library from your iPo… - Apple Community

Hi jojemo2000,

Thank you for using the Apple Support Communities! You can sync content from your computer to your iPod using iTunes or Finder, however, you cannot sync content such as music from your iPod to your computer or to another device. For example if you're using a Mac there would be no other way to sync content to your iPod nano as listed below:

Intro to syncing your Mac and your devices

If you have iPod classic, iPod nano, or iPod shuffle: You have to sync your device with your Mac. There’s no other way to add content to it.

Hope this helps!

Have a great day.