backup.bat

@ECHO OFF

setlocal EnableDelayedExpansion
FOR /F "skip=1 tokens=1-6" %%A IN ('WMIC Path Win32_LocalTime Get Day^,Hour^,Minute^,Month^,Second^,Year /Format:table') DO (
    if "%%B" NEQ "" (
        SET /A FDATE=%%F*10000+%%D*100+%%A
		SET /A YEAR=%%F
		SET /A MONTH=100+%%D
    )
)

ROBOCOPY "YOUR_SOURCE_PATH" "YOUR_DESTINATION_PATH\!YEAR!-!MONTH:~-2!\" /MIR /R:5 /W:5