A stackable and collapsible storage box (100) comprising a foldable wrapper (10) having side wall and end wall panels which are releasably retained within a peripheral channel (30a) on a separate base portion (30). The wall panels have lower extension portions (11, 12) that are folded upwardly to provide a double thickness and these lower extension portions have an upper edge (12a) or apertures (37) that engage with short protrusions (33) formed on an inner wall (32) of the channel to retain the panels. The end wall panels have upper first and second extensions portions (14a, 16) that are respectively folded inwardly and upwardly to provide a support edge (16a) to support hangers for hang files. The support edge can be strengthened with a channel section (19). The box can have a lid (50) has a ridge (53) to compliment channel (36) on the base portion to allow stacking.