An automated storage and retrieval system that includes a rail system that includes a first set of parallel tracks, arranged in a horizontal plane and extending in a first direction, and a second set of parallel tracks, arranged in the horizontal plane and extending in a second direction that is orthogonal to the first direction; a plurality of storage columns located beneath the rail system, each storage column is located vertically below a grid opening, wherein stacks of storage containers can be arranged in the storage columns; and a trolley for transporting the storage containers between the storage columns and at least one deployment area. The first and second sets of tracks form a grid pattern in the horizontal plane including a plurality of adjacent grid cells, each grid cell including a grid opening defined by a pair of neighboring tracks of the first set of tracks and a pair of neighboring tracks of the second set of track. The trolley is movable in a horizontal plane above or below the rail system. The deployment area provides direct access to an area outside the grid pattern formed by the first and second sets of tracks. The trolley provides a container volume for storing at least one of the storage containers. The trolley includes moving devices allowing movement of the trolley in at least one of the first direction and the second direction.