I have a one gig card and on the highest Resolution You can get about 660 pics - lower resolution = a looott more pics. I am actually contemplating on getting another one that is a bit smaller just to have another one besides the 16mb on hand. Not sure. I might go ahead and get another gig card. I can't fathom a 2-3-4 gig card. I think the 4 gig cards are about as much as the camera itself!