RFM USE X: %1:
RFM STOP X:
IF ERRORLEVEL 1 GOTO END
IF EXIST \RBACK\%1\NUL THEN GOTO CHANGED
XCOPY X:\*.* \RBACK\%1\*.* /S
GOTO END
:CHANGED
XCOPY X:\*.* \RBACK\%1\*.* /S/M
:END