FinalSync is an intuitive utility of file synchronization and backup, which automatically synchronizes your pictures, emails, MP3 files, user data and much more to PC, USB flash disks, shared folders of Local Area Network, as well as FTP and WebDAV servers. Any changed files on one side are intelligently identified and transferred by option, which is effective and simple due to mission management feature. The main function of the synchronization software is to synchronize the changed files on both sides to ensure the consistency. If we want accomplish this mission, we have to identify the changed files on both sides and then backup, copy or delete these files on both sides by the synchronization algorithm. In the process, it concerns the filtering algorithms, comparison algorithm and synchronization algorithm on both sides. In order to synchronize to each equipment, on one hand, it has to support kinds of equipments, such as, Windows system files, on the other hand, it has to support kinds of protocol, such as, the HTTP, FTP. In order to run mission automatically and smartly, it has to support events triggered by a variety of missions, such as, regular event, proceedings incident, equipment to connect the incident and mission plan events.