This storage system is of the dynamic type and provides a Last In, First Out (LIFO) operation with a maximum depth of 5 pallets, using carts with bearings that move along a rail anchored to the beams of the rack. This system operates by gravity, so during loading, the forklift pushes the pallets back into the tunnel, creating the necessary space for the pallet to be stored. During unloading, when removing the pallet from the front of the tunnel, the others slide by their own weight along the rail to the front of the module, avoiding the forklift having to enter the tunnel and making the operation much more efficient.