1. A method of searching for a desired image of a plurality of images stored in a digital storage device, the method comprising: a) categorizing each image of the plurality of images into a category according to an image characteristic; b) displaying a first screen including a first subset of thumbnail images from a first category on a monitor of the digital storage device; c) determining a number of times that one of a first and second actuator was pressed; d) displaying a second screen including a second subset of thumbnail images from the first category if one of the first and second actuators was pressed at least one time; and e) displaying a third screen including a first subset of thumbnail images from a second category if one of the first and second actuators was pressed at least two times.