The present invention discloses a method for performing bi-directional synchronization between a host device having a large capacity, e.g., a personal computer(20), in which a dedicated application program is installed and a mobile media player device(10) using play lists. The mobile media player device(10) is capable of independently downloading media content including audio and video files and creating play lists therefrom. Upon connecting the personal computer(20) and the media player(10) play lists marked for synchronization are downloaded from the media player(10) to the personal computer(20) wherein the dedicated application program uses time and date information of the play lists to determine which play lists of the personal computer(20) and media player(10) are to be updated. The updated play lists are stored on the respective devices(10, 20). |