Some "DSi-enhanced" games may only show their extra features (like camera support) when running in an environment with a properly configured NAND.

Being able to boot into the actual console interface rather than straight into a game.

Technically, nand.bin is a raw binary dump of a Nintendo DSi's internal NAND flash memory. This roughly 240MB file contains:

The DSi’s built-in file system where the console stores its operating system.

The file is a foundational component for advanced emulation in melonDS , specifically when moving beyond standard Nintendo DS games and into the territory of DSi-exclusive features. While many users can enjoy basic DS titles with just a BIOS and firmware, the nand.bin file unlocks the DSi’s internal storage, system menu, and DSiWare compatibility . What is nand.bin?

Standalone melonDS requires a valid NAND image to install and launch DSiWare titles via its Title Manager.

Any digital games or applications (like Flipnote Studio or the DSi Browser) that were installed on the original hardware.