SD Card or microSD Card Damaged or Lost
Nintendo 3DS
Information in this article can help you when the SD card included with the system has been lost or damaged and needs to be replaced.
Important: While it is possible to use SD standard or SDHC standard based cards, we cannot guarantee that products other than the official SD card will work.
What to do
The SD card or microSD card will need to be replaced. Any downloaded content will need to be redownloaded, and it is likely the save data will be lost.
Replacements are available from Nintendo Store.