I use a Micro SD card for my Windows libraries (documents/pictures etc) and pass it around between three devices I use frequently so I always have my stuff handy.
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
Curious to know if sd slot is accessible through Bios?