Patent ID: 8515928

Claim:
An apparatus comprising: a first storing unit configured to store a plurality of files; a second storing unit configured to store file information indicating a list of the plurality of files; a receiving unit configured to receive a data acquisition request from a client apparatus; a first reading unit configured to read a file from the first storing unit in response to the data acquisition request received by the receiving unit when the apparatus operates in a first mode and the received data acquisition request is a request for acquiring the file, wherein in the first mode, power is supplied to the first storing unit and the second storing unit; a second reading unit configured to read the file information from the second storing unit in response to the data acquisition request received by the receiving unit when the apparatus operates in a second mode and the received data acquisition request is a request for acquiring the file information, wherein in the second mode, power is supplied to the second storing unit, and power supply to the first storing unit is restricted; and a transmission unit configured to transmit one of the file read by the first reading unit and the file information read by the second reading unit to the client apparatus.