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The information age in which all work are handled by a computerand data serves as the unit of currency, product families that possibly contain data or currency, are already readily available on the market. Of these,
the most prevalent USB In case of USB, the biggest advantage is good portability but behind it, it’s small, easy to lose, and compact, and so it can’t serve as the main data storage device.
Chungju National Univ.
Asan-si, South Korea