Storage system with robot device

A storage system for storing product items, comprising:

• a grid structure, wherein the grid structure has a top level;
• a number of first storage bins configured to be stored in vertical stacks in the grid structure, wherein each first storage bin is configured to contain at least one product item;
• a vehicle, arranged to move horizontally at the top level of the grid structure, and further arranged to pick up, carry, and place the first storage bins at desired locations within the grid structure;
• a robot device comprising:
• a base that is fixed in position with respect to the grid structure and
• a movable arm, operably coupled to the base, with a picking mechanism in one end thereof,
• wherein the robot device is configured to move a storage item between a first location and a second location by means of its picking mechanism, and
• a storage control and communication system configured to:
• control the vehicles to place a plurality of first storage bins in a first robot arm reachable area of the storage grid;
• and
• control the robot device to move the product item from at least one first storage bin in the first robot arm reachable area of the storage grid to at least one second storage bin placed in a second robot arm reachable area outside of the storage grid,
• wherein the first location is the location of a first storage bin stored in the storage grid.