We are developing cubic storage systems for automating the assembly of customer orders and increasing the density of storage of goods within the dark store for companies from the online retail sector. The solution consists of a mine storage system installed in the customer's warehouse, mobile robots that organize the delivery of boxes of goods from the mines to the pick-up area, where the collector works, and a command center that accepts orders and manages the entire system.The cubic storage system allows the customer to increase the storage density of goods by 2-3 times, while increasing the order collection performance by up to 2 times compared to classic racks and manual pick-up. Thanks to this, the customer can save on the leased warehouse space, as well as reduce the required number of personnel. The indirect economic effect is to increase the transparency of warehouse balances, reduce damage and theft of goods, and reduce human errors when assembling orders.