Self Storage Group engages in the operation and rental of self-storage units to private individuals and businesses. It operates through City Self-Storage, OK Minilager segments. The Company operates climate-controlled storage units, container-based storage units, a packaging shop, and an online store for selling storage ancillary goods, such as boxes, tapes, and bubble wraps. It invests in, owns, and develops real estate properties, and acts as an insurance agent.