In one aspect of the present invention, a memory device comprises an interface which interfaces with an external device, an IC chip which stores one or more application programs and executes the application programs, a memory which stores associated data associated with the one or more application programs, and a controller connected with the interface, the IC chip, and the memory. In response to a predetermined command received from the external device by way of the interface, the controller performs transfer of the associated data between the IC chip and the memory without passing the associated data to the host device during transfer of the associated data between the IC chip and the memory.