Nintendo Support: How to Remove an SD Card or microSD Card
New 3DS/New 3DS LL】microSDカードの取り出し方を教えてほしい。
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
new3DSLLに256GBのmicroSDを使ってみた結果! - スキあらばGAME
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Amazon.com: 32GB SanDisk Ultra UHS-I Class 10 80mb/s MicroSDXC Memory Card works with NEW Nintendo 3DS XL Video Game with Everything But Stromboli Memory Card Reader : Electronics