A system and method for maintaining data synchronization across a plurality of user devices is provided. The system and method manage data synchronization among a plurality of data storage devices includes a mobile personal information system adapted interface with a number of data storage devices. A personal information system supports multiple data synchronization protocols so that the personal information system may synchronize data with a wide range of different data storage devices. A synchronization arbitrator is associated with the personal information system. The synchronization arbitrator is adapted to register all of a user's personal devices which store the user's personal information. The synchronization arbitrator also initiates a data synchronization function with each registered data storage device, employing the synchronization protocol appropriate for each device. The personal information management system may comprise a vehicular mounted personal data storage system. The user devices may include a hand-held personal data storage system and a computer adapted to store personal data.