Go to system settings - data management - 3DS - Software. You should see your open blocks. That's your SD card space.
Fire Emblem digital is 8579 blocks+ the content if your downloading that after. I'm gold this is close to 1Gb+ --- team: (Me),Shiryu,Shiroh,Kirby,Picori,Gaomon,Treecko,Spyro,& Wolfkin. Galaxy Beast: Azure(Otter) 3DSfc 4227-1270-5344 PM me.
also, right before you check out a game in the eshop, it will show you how many (memory) blocks it takes, how many you had, and how many you will be left w/ after the download. --- I need a sharp instrument... or blunt, blunt is good, too. - Chisame Hasegawa, Negima (Del Rey TL)