Abstract: A storage unit is provided. The storage unit includes a floor assembly, a sidewall assembly, and a lid assembly. The sidewall assembly includes a number of modular corner members and a number of modular panel members. The sidewall assembly including a lower perimeter and an upper perimeter. The sidewall assembly lower perimeter is coupled to said floor assembly with the sidewall assembly extending upwardly from said floor assembly. The lid assembly is movably coupled to said sidewall assembly and is structured to move between a closed, first position and an open, second position. The floor assembly, the sidewall assembly and said lid assembly define an enclosed space. Use of the modular sidewall members and, in an exemplary embodiment a modular floor assembly, allows the manufacturer to produce storage units of different sizes at a minimal cost.