12th May 2006, 4:42 PM
They're not SD cards, insofar as a compatible type. There are a good half-dozen different kinds of common memory cards, and the DS chips do resemble the SD more than any of the others, but it has twice as many connectors and is probably a hell of a lot faster to interface with since it's both proprietary and mostly read-only.
YOU CANNOT HIDE FOREVER
WE STAND AT THE DOOR
WE STAND AT THE DOOR