Hello! I'll let you know that I'm from Brazil and I'm using Google Translate to write here, so I apologize if there are any writing or grammar errors.
I've had a Nintendo DSi for a few years now, it's been a while since my game card stopped reading and I don't know how to solve this problem...
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