@echo off
echo. 
set w=e:移除.bat
set spath=e:外勤
set bakpath=d:備份外勤
set /a y=%date:~,4%,m=1%date:~5,2%-2
if %m% lss 101 set /a y-=1,m+=12
if exist %spath%%y%%m:~-2% (
call %w% 
) else echo %y%年%m%