Thanks Helen for the link . My schema is the following: PC1 ( WINDOWS ): C:\user\Documents\footscan\Settings/database/footscan -> file that needs to be sync 9 gb PC2 ( LINUX ): /home/user/footscan/Settings/database/footscan-> 7gb footscan: belongs to a database sqlite used by a device for save customers's information. Conexion bewteen computers is poor so i want to sync one file already existing in PC2. In worst situation sync file whole again. Thanks both.