there's an app (can never remember the name of) that can mass backup gba saves or inject them. the original way can only do one save at a time. it's through godmode, yes. I think both might be. I'm not really sure how it works, but the mass injection/backing up method didn't exist when I did mine. yes, gba saves will appear on the sd card. I had to inject the save, backup the folder, inject another (which would replace the original), then drop the backed up folder back on the sd card. not hard, but it's tedious. that's no longer necessary afaik, but I have no experience with mass backing up using that app.