Sam Smith if the iPod is a 2nd gen then everything is stored on the hard drive. Apple uses a really weird way of storing the files on that drive. It does not look like any “normal” directory. There is some software that will help creating order out of the chaos and will help removing the files. Check write-ups like [https://www.makeuseof.com/tag/transfer-music-ipod-computer/|this one] and more about that [https://everymac.com/systems/apple/ipod/ipod-faq/transfer-copy-songs-ipod-to-computer.html|on here]. Let us know if this is really a 2nd gen iPod and if you need some more specific help.