A Type XII storage module is a type of large cargo container. It is often favored by planetary colonists, as the type XII module can serve as temporary shelter prior to the construction of permanent structures.
In 2355, Aldo Corsi was hired to transport five type XII storage modules to Juhraya. When Starfleet Intelligence solicited Corsi's help in an intelligence-gathering mission, their equipment and personnel were hidden in a sixth module. (SCE eBook: Home Fires)