The DSTT Card allows for easy file transfer and game playing on Nintendo DS and DS Lite systems. It plugs directly into the system's slot 1 interface and supports dragging and dropping files from a PC to its flash memory card. Games and saves are stored on the removable and high-speed microSD card up to 4TB in size, ensuring saves are never lost. It also supports homebrew, cheats, skins, and other accessory functionality like rumble packs and WiFi games.