Goombpy

atm i'm just generally trying to get my savefile on the sd card. I don't really have anything else to work with me atm, but I can test a different sd card Just to put it simply, when I move the sd card over to my computer (after saving). it doesn't show the save just incase is there a specific emulator (ds specific, prefered [if possible]) I should be using please tell me, or should I move it over to a 3ds and see if actually shows the file for the save?

So, I've been trying to do this for a while but I can't seem to get my file. I'm on the game currently and I have the game up I've saved multiple times but the file never shows. I keep checking the ds file on my sd card, but again it never shows. Is there anyway I can resolve this issue? if it helps at all, I'm trying to do this on a platinum save.