there is a way. (this is what ive done)
step 1. Move all the roms/saves from your games folder to the root of the card.
step 2. right click the "EDGE" folder, and set it as "hidden"
Do this for everything in the root of the card that you dont want to display on the EDGE OS
when you boot up...
although i ended up accidentally changing my nand with no way of going back bc i didn't know you needed a gamecube controller to restore it (i have a wii minus/1.1, which doesn't have gamecube controller support)
and if i find the sd card i have my NAND backed up on, i can not only restore the NAND if i solder the right part in, but i can also put my NAND on dolphin, then i can play dolphin online, like PMEX Remix or MKWii Riibalanced