A digital still camera includes a vibration detector for detecting vibrations. In accordance with certain conditions, a control unit controls finalization (session closing) which enables a CD-ROM drive to read data recorded on a recording medium. The control of session closing includes starting session closing after a predetermined period of time elapses since the selection of the execution of session closing. The countdown id displayed to indicate the time remaining before the start of session closing. After the countdown is completed, or when the vibration detector detects vibrations during the countdown until the start of session closing, session closing is not started.