ExSync has a basic SQL server backup in place that will create a back up file of the currently selected SQL server and save it to the the local host boot hard drive with a file name like:
DatabaseName_Date_Time.bak
This backup is not designed to replace best practice for the management and backup of SQL Server. It is there to enable snapshots of the database before purging or shrinking the logs to cover any errors in these processes.
It is useful to backup before any major changes to the database.