I'm using a 1 gb sd card. I have been using it for about 2 years with no problem for homebrew apps, etc. All of a sudden, I started up my back up of "new super mario bros" using neo gamma r7 and it was no longer reading the disc nor was it reading anything from my sd card. When I went to check...
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