1. An information processing system, comprising: a storage device; and an information processing device for performing near field communication with the storage device; wherein: the storage device stores application data usable in a predetermined application program and shared data usable in an application program regardless of whether the application program is the predetermined application program; a processor included in the information processing system executes: receiving an instruction regarding storage device data read and/or storage device data write from an application program to be executed by the information processing device; in the case where the received instruction relates to the application data, under the condition that the instruction is from the predetermined application program, passing the application data read from the storage device to the predetermined application program; and in the case where the received instruction relates to the shared data, passing the shared data read from the storage device to the application program that issued the instruction regardless of whether the instruction is from the predetermined application program; the storage device stores identification information specifying at least one type of predetermined application program which can use the application data; the processor receives, from the application program, the identification information corresponding to the application program that issued the instruction; and the processor determines whether the received instruction is from the predetermined application program based on the identification information stored on the storage device and the identification information acquired from the application program that issued the instruction.