I hve a 2 gig memory card and at the middle of the 3 resolution settings it will hold approx 2550 photos. I also have 2 256-meg cards. If I set the 2 gig card to lo resolution, which I may do for close ups, I can get 13,000 photos on it. Since I will mostly be doing photos but also a bunch of quick 5-second video shots, I think I'll be covered. however, I'm a huge shutterbug so I'm planning to buy another 2 gig before the trip.