I remember for my birthday one year I wanted the Sega CD Memory card/cartridge thing. It was literally just a memory card BUT I thought it was some magical tool, officially licensed/made by Sega mind you, where I could then go to blockbuster and rent games and it would then SAVE those games...in their entirety...to the memory cartridge. thus allowing me to have a bunch of games without paying full price for them. This is what I believed the thing did. that was my birthday present. a memory card.