Abstract: A mounting bracket assembly and file container assembly include a pair of mounting brackets and a file container which can be easily mounted to a vertical surface such a wall or a file shuttle or cart. The mounting brackets include supporting posts for supporting a file container and through holes for mounting the brackets to a vertical surface. Alternatively, the mounting brackets can be attached to a file shuttle using elongated slots along an edge of the bracket. The slots and posts are located on the brackets to provide a uniform footprint when surface mounting or access to the slots when file shuttle mounting.