you should be able to turn the qual. up or down on the camera depending on how many pictures you want to store on the card. for ex. my 4mp nikon currently has a 128mb card. if i turn the quality on 'hi' and the image size on "2272"/max, i can take about 60 photos. now if i turn the image qual. on "basic" and size all the way down to "640" i can take over 1,000!