Nintendo 3DS Blank Cartridge

thingiverse

This resembles a modified "blank" SD card that inserts into an SD card socket in certain laptops and desktops. I find it handy to keep something in my 3DS at all times, even when not using it, so dust won't gather in the slot. My custom-made solution involves recessing the area containing the pins to minimize wear on the actual cartridge components. The finished product snaps into place seamlessly!