So how would this work?

[tollhouse2006]

I'm deciding on deleting my whole brawl file, but i have my photos and created stages on an sd card.  when i start the new game, is it gonna be able to let me play on created stages that have parts that need to be unlocked and music that we dont have cds for? 

[Mutilator7]

I think the stages will work but i'm not sure about the cd's. *remembers cd factory stage that everyone made to get all the cds the week brawl came out*

[Depster]

your stages and everything that comes with it will be fine, but you still will have to unlock the songs again

[JrDude]

If they wouldn't work, then an SD card would be mostly pointless.