| 摘要 |
A portable information terminal is equipped with a flash memory including a data storing region and a directory region for storing programs and data. A memory optimization order is set for instructing execution of optimization processing for the flash memory. The optimization processing includes deletion of data stored in a designated area of the data storing region corresponding to information indicating deletion of the data. Through the optimization processing, the designated area of the data storing region is restored as an available data storing region. The optimization processing for the flash memory is executed in response to stop of electric power supply to the portable information terminal.
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