If you mainly use cia files you will want the larger card in the SD slot. You can use a mSD with an adapter. It seems the general consensus is 64gb is a bit overkill unless you want lots and lots of games at hand all the time. Meh, that's what I got.So like many others, I'm a first time Gateway user. Until now, I'd forgotten about memory cards. Reading about CIA files and regular ROMs, I'm wondering which memory card I should get. I currently have an 8GB micro-SD card that I've been using with my R4, and the original SD card that came with my OG 3DS. Would I be better off with a 64GB SD card, and a 16GB micro-SD, or should I get a 64GB micro-SD with a 16GB SD card? I'll be playing online, so I suppose mainly using CIAs if that matters.