Tips on how to save storage working on tracks?

I have 15 MB left and I make large tracks now, but I want to keep my old multicup, what should I do?

posting your images to sites like FileGarden won't lower your storage quota.
you'll have to make an account for it but it's worth the 5 minutes it takes to make an account

That actually helps A LOT...

But I can't change the size of the track, that's the problem.