An exemplary storage system generally includes a least one back channel mountable along a support surface (e.g., a back wall of a closet, etc.). At least one wall or panel of the storage system is mountable (e.g., via a connector, etc.) along the back channel. The storage system may also generally include one or more of a hang rod, side bracket, shelf trim, end cup, support bracket, and/or shelf. The shelf may be supportable by the back channel, a pair of side brackets, and at least one support bracket. The side brackets may be mountable along sidewalls of the closet and/or to the at least one wall or the storage system that is mountable along the back channel. The hang rod may supportable beneath the shelf when first and second end portions of the hang rod are supported by respective first and second end cups.