Conveying storage device and method for operating the conveying storage device

A conveying storage device for containers, comprising:

• a first drivable conveyor which is adapted to convey containers on a first conveying surface in a first direction;
• a second drivable conveyor which is adapted to convey containers on a second conveying surface in a second direction, wherein the first drivable conveyor and the second drivable conveyor are positioned parallel to one another such that containers are transferable from the first conveying surface to the second conveying surface, and wherein the first direction and the second direction are opposite to each other;
• a transfer device, which is movable along at least one of the first drivable conveyor or the second drivable conveyor, for transferring containers from the first conveying surface (4, 25) to the second conveying surface;
• a guide body which is movable along a region between the first drivable conveyor and the second drivable conveyor above the first conveying surface and the second conveying surface;
• and
• a guide railing for guiding and separating containers, which extends at an angle to the second direction and above the second conveying surface, wherein the guide railing is variable in length and cooperates with the guide body such that the length of the guide railing and the angle can be varied.