A data storage device, the data storage device may include: a data storage unit; a system data storage unit that stores an application program, an operating system (OS), and management information related to a processing of the stored data; a system control unit that performs an initialization, a control, and a system setting of the device; a central processing unit (CPU) that performs data processing including data read and data write and processes an instruction word; a random access memory (RAM) that loads the data from the data storage unit and the system data storage unit, loads the instruction word of the CPU, and temporarily stores a data processing result of the processed instruction word; and an output determination unit that determines to output at least one of the data stored in the data storage unit, the application program, and the data processing result.