Operation: the drums coming from the feeding are directed to a pre-forming station in the row. As soon as this is completed, it is moved to a drum recovery system, for the completion of the layer, which can be with one or more rows. Once the layer is completed, a trolley with a drum pick-up head will take them simultaneously and place them in the warehouse. The filling of the same takes place in such a way that the double or triple level is formed progressively.