Abstract: A storage device includes a plurality of shells with each shell having upper and lower ends, front and back faces, and opposed sides. Each shell defines an enclosed interior area and having a door for accessing the interior area. The shells are selectively maintained one above another in a stacked configuration. The shells are allowed to rotate relative to one another so as to selectively maintain respective back faces adjacent one another. The shells are able to separate from one another. A plurality of wheels are adjacent at least one shell back face adjacent a respective upper end or lower end. At least one shell includes a retractable handle. At least one shell includes a hanger element configured to distribute a hanging force throughout the shell upper end.