HELLO!? CAN YOU HELP ME!! MY BROWSER DOWNLOADS A sb3 AUDIO FILE INSTEAD OF wav FILE ON SCRATCH!?!?!?!?!?!?!?

I don't know why it's doing that, but my guess is the way you are trying to download the file/s. Maybe try reproducing the error just to make sure the error is truly occurring.

sb3 only happens when you download the project.
what you should do is this:

I'm on a mac so it played that animation, but if you right click the sound and then click “export” it should save to your computer.