@cmjones , you may want to go to the microsoft web site and down load the latest version of synctoy. Does exactly what you want to do. its free and works quite well.
I have 4TB of hirez files I needed to move last year so used sync toy to do it.
http://www.microsoft.com/en-us/download/search.aspx?q=synctoy
I have 4TB of hirez files I needed to move last year so used sync toy to do it.
http://www.microsoft.com/en-us/download/search.aspx?q=synctoy