I tried to add the folder, no luck, it seems not supported, so I would like to ask if there is a tool that can rebuild the .fa file(I can't find a valid tool use google) thanks,my friend.
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi