A system and method for synchronizing devices which can couple to the Internet, or any network. In one aspect a system for synchronizing data between a first system and a second system is provided. The system includes a first sync engine on the first system interfacing with data on the first system to provide difference information. A data store is coupled to the network and in communication with the first and second systems. A second sync engine is provided on the second system coupled to receive the difference information from the data store via the network, and interface with data on the second system to update said data on the second system with said difference information. Difference information is transmitted to the data store by the first sync engine and received from the data store from the second sync engine. A method for synchronizing at least a first file and a second file resident on the first and second systems, respectively, coupled to the Internet, respectively, is also provided. The method includes the steps of: determining difference data resulting from changes to the first file on the first system; transmitting the difference data to a server via the Internet; querying the server from a second system to determine whether difference data exists for files on the second system; retrieving the difference data to the second system; and updating the second file on the second system with the difference data.