Install Checkpoint, JKSM or Save Data Manager, they will extract and copy your save to your SD.
Open Citra, right-click on the game, "open save file location", copy your saves (respecting the file structure).
For re-importing, do the same, all...
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