An album list file stores album information relating to album containing image data files, and an album list storing sequence information indicating a replay sequence of image data files at the time of replaying the image data files belonging to the album. In one embodiment a rotary steerable tool includes at least one formation evaluation sensor deployed in the steering tool housing. A momentary unidirectional lock in the housing is arranged to be normally disengaged from unidirectional teeth on the reel.