random in Small YouTubers Group

Share your stuff, bud!
non scripter robloxian here
i have a question how do i make it so when you make an avater in a game and then you go to a different game it keeps the same avater that you made it the last game

I see this on a video and I have a storm going one maybe this seems connected slightly
(Also I only joined because I have channels I used to be active in)
i wanna kill myself :)
its saying the mp3 file is invalid
its under 7 minutes and under 19mb
and its music by roblox
and its saying that if i resave the audio it could work
but i did :) and it doesnt work :)

My game is gonna be boring and quiet.. :(
why is it not allowing mp3?..
what file do i need for it to work??