The present invention provides a method for making it more convenient for a user to try out contents. When contents are received, the contents are written in a free space or a space where some data is already stored, of cache memory means (409a). When contents are written in the cache memory means, the contents are processed or executed. When a command is issued using operation means for storing contents processed or executed, the contents are read from the cache memory means (409a), and written in content storage means.