An apparatus for image formation is disclosed which includes an imaging device forming images on record media; a housing defining a front face, a rear face, both side faces, a top face and a bottom face, to thereby house the imaging device; a recessed portion configured so as to be openable at selected at least one of the front face, the both side faces and the top face of the housing; and an attachment mechanism allowing a data-storable external storage device to be attached to the apparatus for electrical connection thereto, the attachment mechanism being in a position allowing the external storage device, when attached to the attachment mechanism, to be accommodated within the recessed portion.