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By progressing of technology nowadays, its more convenient for information transmitting. The capacity of memory is larger gradually and the types of memory device are also various.
Some people may have many personal disks. When they need the data, they forget which disk the data is . Its really inconvenient. Sometimes we need to borrow a file from out friends, but there is no computer around. If we borrow the disk home, we may worry to disturb our friends work. It is really annoying.
Chien-Hsiung Chen Associate Professor