A storage system includes storage modules, which are stored in a three-dimensional array, transportation devices that transport the storage modules, a control device that controls movements of and access to the storage modules and a storage structure that includes storage spaces for storing the storage modules, and transportation tracks for the transportation devices. The storage spaces comprise the three-dimensional array. The transportation device includes a horizontal linear movement device, a horizontal rotational movement device and a vertical linear movement device. The horizontal rotational movement device rotates the storage module during when the horizontal linear movement device moves the storage module.
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