Many 3DS titles launched with game-breaking bugs that were only resolved via later patches.

Inside FBI, select , then navigate to your CIA folder. Highlight the update file. You will see a few options:

Standard .3ds files are raw dumps of game cartridges used primarily for PC emulators like Citra. .cia files are digital packages meant to be installed directly onto actual 3DS hardware.

If you’re still rocking a Nintendo 3DS in 2026, you’re part of a dedicated community that refuses to let one of the greatest handheld libraries in history fade into obscurity. Since the official eShop closure, the method for managing and expanding your collection has shifted entirely toward files.

Installing a poorly modified or malicious CIA file can permanently corrupt your 3DS operating system.

: They act as "digital blueprints" to install software onto your SD card.

Create a folder named cias on the root of your SD card to keep your directory organized. Copy your downloaded .cia game and update files into this folder.

This is the native format used by Nintendo to install content directly to the 3DS system memory or SD card.

To use .cia update files, you must have a Nintendo 3DS, 2DS, or New 3DS console running . The industry standard for 3DS homebrew is Luma3DS , typically installed via the Boot9strap exploit. You will also need: A high-capacity SD card (formatted to FAT32).