Maxium Regocnizable How much is the most recognizable amount of Flash Memory on the SD card. If I put a 4GB card in there, would it recognize 4GB. I know I can't really use 4GB, but I'm just wondering how much it can really be expanded?
2GB only. Larger cards are SDHC, not SD. They two specifications are not the same and the calculator only supports SD. Don't worry about this limitation. You can easily store the entire collection of all software every published for this calculator on a 2GB card.