(It is a very simple to use Windows file synchronization software. It is capable of file synchronization between several folders, automatically overwriting old files in several synced folders with newer files. The software comes with a small database that monitors the file status after each update. If after a synchronization, you delete some files in the synchronization folder, it will also delete the copies of several other folders during synchronization, instead of repeatedly copying the undeleted old files to the newer ones. folder. Local area network backup.)