Abstract: This disclosure includes an item storage and retrieval device comprising one or more stacked circular disks, each disk having a slot on its radius to the center and rotating on a central column such that, when slots on higher disks are aligned, a target disk may be accessed below for item storage or retrieval; which device may further comprise a disk item access unit for placement, orientation, and retrieval; which device may further comprise one or more RFID readers; and which device may further comprise a system and interface for managing and optimizing item storage to and retrieval from stacked circular disks.