For New 3DS, check MicroSD Cards Compatible With New Nintendo 3DS. A computer with a built-in SD Card reader or an external SD Card drive.

Backing up the old SD card data If you're upgrading from an older 3DS (or just moving to a bigger SD card), you're going to need to back up the data from your old SD card.

Format an SD card in the device you plan to use it in to ensure best possible compatibility. Choose the format recommended by the device manufacturer - FAT32, exFAT, or NTFS - based on compatibility ...

Before you start using that SD card or microSD card, you're going to want to format it. Here's how, six different ways.

SD and microSD cards are a de facto part of modern tech, especially for transferring large photo, video, and music files. Sometimes it’s necessary to format a card to clear room, or make it compatible ...