One's like SD, mini SD, Compaq flash, Smart Media, MMC, that stuff. The only difference I see is the size of the card. Can someone tell me why all these card are so unique from each other?
the first ones were the compact flash, and i believe companies had to pay fees to enable their devices to use them, so manufacturers started creating their own proprietary media.
sony uses their memory stick, fuji uses their xd, and so on and so on