A modular storage assembly (240, 300), comprising: a first module comprising: a first rectangular, substantially flat back panel; a first left and a right side panel (14a, 14b), said first left and right side panels (14a, 14b) perpendicularly attached to opposite sides of said rectangular back panel, and having a substantially flat outer side and a ridged inner side comprised of alternating evenly spaced pins and tails, wherein each end of said first left and right side panels (14a, 14b) terminates with an end pin, wherein said first right and left side panels (14a, 14b) include a plurality of notches along a side of said first right and left side panels (14a, 14b) parallel and opposite to said rectangular back panel, wherein each of said plurality of notches coincides with a tail; and, a top and a bottom panel perpendicularly attached to opposite sides of said first rectangular back panel perpendicular to said first left and right side panels (14a, 14b), said top and bottom panels having substantially flat outer and inner sides, said inner side includes an extending member at each end that is slidably insertable into a first tail from each end of said right and left side panels (14a, 14b) forming a dovetail joint, wherein said end pin on each side panel (14a, 14b) forms a flush corner with said top or said bottom panel, wherein said first module forms a rectangular open box when fully assembled; and, a second module comprising: a second rectangular, substantially flat back panel; and a second left and a right side panel (14a, 14b), said second left and right side panels (14a, 14b) perpendicularly attached to opposite sides of said rectangular back panel, and having a substaiitially flat outer side and a ridged inner side comprised of alternating evenly spaced pins and tails, wherein each end of said second left and right side panels (14a, 14b) terminates with an end pin, wherein at least one of said first left and right side panels (14a, 14b) are attached to at least one of said second left and right side panels (14a, 14b) by at least one slidably insertable fastener (35, 37, 40) inserted into at least one tail of each respective side panel (14a, 14b). a first module comprising: a first rectangular, substantially flat back panel; a first rectangular, substantially flat back panel; a first left and a right side panel (14a, 14b), said first left and right side panels (14a, 14b) perpendicularly attached to opposite sides of said rectangular back panel, and having a substantially flat outer side and a ridged inner side comprised of alternating evenly spaced pins and tails, wherein each end of said first left and right side panels (14a, 14b) terminates with an end pin, wherein said first right and left side panels (14a, 14b) include a plurality of notches along a side of said first right and left side panels (14a, 14b) parallel and opposite to said rectangular back panel, wherein each of said plurality of notches coincides with a tail; and, a top and a bottom panel perpendicularly attached to opposite sides of said first rectangular back panel perpendicular to said first left and right side panels (14a, 14b), said top and bottom panels having substantially flat outer and inner sides, said inner side includes an extending member at each end that is slidably insertable into a first tail from each end of said right and left side panels (14a, 14b) forming a dovetail joint, wherein said end pin on each side panel (14a, 14b) forms a flush corner with said top or said bottom panel, wherein said first module forms a rectangular open box when fully assembled; and, a second module comprising: a second rectangular, substantially flat back panel; and a second left and a right side panel (14a, 14b), said second left and right side panels (14a, 14b) perpendicularly attached to opposite sides of said rectangular back panel, and having a substaiitially flat outer side and a ridged inner side comprised of alternating evenly spaced pins and tails, wherein each end of said second left and right side panels (14a, 14b) terminates with an end pin, a second rectangular, substantially flat back panel; and a second left and a right side panel (14a, 14b), said second left and right side panels (14a, 14b) perpendicularly attached to opposite sides of said rectangular back panel, and having a substaiitially flat outer side and a ridged inner side comprised of alternating evenly spaced pins and tails, wherein each end of said second left and right side panels (14a, 14b) terminates with an end pin, wherein at least one of said first left and right side panels (14a, 14b) are attached to at least one of said second left and right side panels (14a, 14b) by at least one slidably insertable fastener (35, 37, 40) inserted into at least one tail of each respective side panel (14a, 14b).