Hi Scott; I going to assume you are only "saving" MIDI AND TECHNICS songs. If so then a 250MB card is enough. This is the amount of "songs" the keyboard will load, from a SD card and play. Any SD card that works with a camer will work in the KN7000. Notice I said SD card the other forms will not work, i.e Compact Flash etc. If you are comfortable with DOS or Windows Explorer there is away around this restriction, but you have to have a computer with you that has a "SD card reader. Dick