A system, method and program stores, in a local cache, only a small part of a large file that is being requested over a network such as the Internet. The memory card includes interconnection terminals for electric connection with an external electronic machine. The second surface is spaced a gap distance from the first surface in a direction substantially perpendicular to the first surface. The releasing member is sized so that with part of the releasing member inserted into a center opening of the reel, and two of the three leg portions positioned near the through holes, the remaining one leg portion can be dropped and inserted within the center opening.