How to make builds/packages smaller? (read on)

So whenever I package my game for development, the folders that contain my game’s music and sound effects are pretty big. They contribute to more than half of the total package size, and add a lot of time to the packaging time. So I’m wondering if there’s any way I could package the music once, and use it for multiple packages, if that makes sense. In other words I want the music to be in one folder, and then have all of my packaged projects reference that one music folder, and not package it again in a new folder.

Thanks for your help!