How would I go about having my game generating a folder and have it be able to where the player imports the .mp3 file and they play and loop once they all play? No idea, just know I have to use system.io. Any help is much appreciated!
a good way to go about that, is using StreamingAssets, so, basicly, you have to create a folder in the root folder of your project (/assets) called StreamingAssets. as you would notice, when you build the game, you will see a StreamingAssets folder in GameName_Data folder when you have the build. everything you put in the StreamingAssets folder will also be put there when you build the game. the issue is that you cant easily acces those files (you cant drag and drop the mp3 into a GameObject in the scene) You will need a special script. to locate the MP3 file, and set the Audio source file to that.
Heres the Doc: (Unity - Manual: Streaming Assets)
i hope this helps you.
Goodluck!