A pen system for recording a track of handwritten information created by the pen device is provided. The pen system comprises: a handheld pen device for recording the information in a digital format; and a memory for storing the recorded information. The memory includes: a first memory unit located in the hand-held pen device; and a second memory unit located in an external data storage device. The memory units are connected in such a way that transmission of the recorded information is caused to occur automatically from the first memory unit to the second memory unit, and through transmission of the recorded information from the first memory unit to the second memory unit. The recorded information can exceed the storage capacity of the first memory unit and thereby, from the point of view of the user the first memory unit and second memory unit form a coherent memory unit.