A system includes a server site that includes a memory for storing update data sets that correspond to data sets stored on multiple computing devices of a user. The system also includes a synchronization manager for determining that one computing device associated with the user and another computing device associated with the user are absent one or more data updates stored in the memory at the server site. The synchronization manager is configured to send in parallel, absent establishing a data transfer lock, the one or more data updates to the both computing devices of the user for updating the corresponding data stored on each computing device.