How to keep my source and target SharePoint sites in sync?
Once I sync up the source and target SharePoint locations, can I copy (incremental update) only the libraries, lists, folders or files that have changed in the source location to the destination location?
Dockit Migrator for SharePoint facilitates incremental migration of contents across SharePoint sites after the contents are synchronized to a base level using Dockit or manually. Once this synchronization is done, you can setup Dockit (SharePoint Migration) tasks using ‘Incremental Migration’ feature to migrate only the new files or file versions as and when they are created.
You can refer Incremental Migration section in the help document of Dockit.