Command line option /S
The source to target option specifies that files are to be copied from the first, or source, path to the second, or target, path. Files will not be copied from target to source unless the /T option is also used.
Example:
C:>Cmdsync d:\MyData "*.* -*.bak" e:\MyDataBackup /S /I /R /D /Lc:\mylog.txt /X