Portable information processing terminal device with low power consumption and large memory capacity

摘要: A portable information processing terminal device, realizing both a low power consumption and large memory capacity, is formed by first for storing files, second plurality of the having larger capacity higher than memory, unit configured to read process files stored in access when desired file does not exist judgement judge whether there possibility external supply or not, prohibition prohibit activation judging judges that no supply, control select prescribed are expected have probabilities being accessed during period which prohibited unit, store into advance.