what sd cards are compatible with 2ds?
Nintendo 3DS, Nintendo 3DS XL and Nintendo 2DS systems work with SD Cards up to 2 GB in memory, and SDHC cards from 4 GB to 32 GB. You can use the SD Card included with your Nintendo 3DS, Nintendo 3DS XL or Nintendo 2DS system, or the following Nintendo-authorised SDHC Cards: 8 GB [RVL-037] or 16 GB [RVL-038].