Medium Warehouse Storage - 1,152 items (18 stacks).Small Warehouse Storage - 576 items (9 stacks).There are three tiers of Warehouse Storage Block, with different amounts of item storage per block: To store items, Warehouse Storage blocks must be placed within the Control Block's bounds. The Control Block outlines a 7x4x4 boundary box, which can be configured with the Bounds button underneath the hotbar while using the Control Block. The Warehouse structure requires a Warehouse Control Block. All blocks in the structure are unlocked with the Trade research. It serves as a mass-storage and automatic item sorting structure. The Warehouse is a multi-block structure included in the Automation module.