https://forums.macrumors.com/threads/175405/
especially
https://forums.macrumors.com/posts/2084404/
Now, same suggestion applies to you -
1. transcode songs (loss in quality)
2. rerip songs (not possible)
3. only put some of your music on your iPod
4. get a music player that holds more music
now, i think #3 is most reasonable, considering how
1. i'm pretty sure iTunes transcodes to get songs to fit on the Shuffles
2. The shuffles are the only iPods where it would make sense to ask a question like yours...
odds are, every time you plug it in to recharge your iPod, you either already hook it up to your computer, or it would take all of 3 seconds to do so. do you really need (at least) a minimum 2 gigs of music (which is actually a lot) all the time? Sure, it's nice to have all your music on your iPod, but really? I have a 40gb, and I sure as hell don't listen to all the songs on it, neither could i listen to all those songs inbetween charges (would take me an unreasonable amount of time, especially if it was all unique songs, 24/7 - to the tune of over a month, not including the lower-quality audiobooks and the podcasts), nor have a need to do so.