How to Format SD Card for Nintendo 3DS (XL) with Freeware?
Amazon.com: 3DS Game Holder Card Case, 28-in-1 Game Holder Card Case Compatible with Nintendo NEW 3DS / NEW 3DS XL / 3DS / 3DS XL / DSi / DSi XL / DS /
Nintendo Support: How to Remove an SD Card or microSD Card
Why does Nintendo want to hide the micro SD card slot on new 3ds xl unless if you have a size 0 Philips screw driver to remove the back plate : r/3DS