Those numbers sound way too high. The largest SNES and N64 carts were only 6 and 64 MB respectively. (plus a quick transfer of SMW to a SD card reveals the game to be only 3.59 MB in size)ThePlothole

 it would be interesting to see if there is some sort of compression used in them when they turn into emulated roms.  i could have sworn i read the zelda on n64 was 128 MB, but sometimes nintendo likes to say its 128-Mb, not MB, so maybe thats where im misremembering.