Hello there, thank you for making and sharing a custom pack for Sonic 3D in 2D!
Overall the pack is quite good and some of the tracks sound really great in game, but I think that the size of the download could be reduced a lot.
Some of the tracks are very long and very large in size: VVZ1 for example is a 72 megabyte track of 29 minutes length. As a stage lasts at most 10 minutes it's far too big anyway.
You should open them in a program like Audacity, and make them shorter.
Also there is no need to repackage the Saturn folder in your download, that will further reduce the size of your music Pack!