set tagfile=\oemdrv\[Win8.x86]WanDrv6.ini
set tagfile1=\DriversBackup\驱动备份.txt
FOR %%i IN (C D E F G H I J K L M N O P) DO (
cd\
IF exist "%%i:%tagfile1%" dir %%i:\DriversBackup /ad /b /s>%~dp0List.txt
IF exist "%%i:%tagfile%" set CDDRIVE=%%i:& GoTo aa
) >nul
set CDDRIVE=C:\tools