I have an old M3 micro sd flashcard (the one that has different size shells for GBA and DSLite) that I stuck with for so long because of RTC. I just replaced the battery. The patching software doesn't work in newer versions of Windows, but I haven't run into a problem with clean roms yet.
Would...
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