Abstract: An expandable filing container which has a front panel, a back panel and an expandable connecting panel connecting the front and back panels. Hinged panels or flaps are positioned inside at each end of the container near the connecting panel. When the connecting panel is expanded to accommodate material in the container, the flaps are folded toward the connecting panel and are positioned between the front and back panels. A plurality of different degrees of expansion of the connecting panel, and flaps may be positioned at various locations inside the container to divide the container into compartments.