1. A storage device comprising: a near field communications transponder; and a memory coupled to the near field communications transponder, the memory configured to provide: at least one application data storage area dedicated for use by a first application; and a shared data storage area usable by the first application as well as other applications, the shared data storage area storing at least one of (a) identification information specific to the storage device, (b) identification information representing a type of the storage device, (c) identification information specific to an external appearance of the storage device, and (d) identification information specific to a group to which an object represented by the storage device belongs.