Things You'll Need
Instructions
Insert your MicroSD card into the M3 adapter. The data side of the MicroSD card's lettering should be on the same side as the securing screw on the adapter.
Insert the adapter into the memory card slot on the Nintendo DS.
Use a screwdriver to tighten the securing screw on the adapter so it does not fall out of the Nintendo DS.
Turn the Nintendo DS on to use your MicroSD card.