@echo off
cls
if exist d:\x.txt set drv=d
if exist e:\x.txt set drv=e
if exist f:\x.txt set drv=f
if exist g:\x.txt set drv=g
if exist h:\x.txt set drv=h
if exist i:\x.txt set drv=i
if exist j:\x.txt set drv=j
if exist k:\x.txt set drv=k
if exist l:\x.txt set drv=l
if exist m:\x.txt set drv=m
if exist n:\x.txt set drv=n
if exist o:\x.txt set drv=o
if exist p:\x.txt set drv=p
if exist q:\x.txt set drv=q
if exist r:\x.txt set drv=r
if exist s:\x.txt set drv=s
if exist t:\x.txt set drv=t
if exist u:\x.txt set drv=u
if exist v:\x.txt set drv=v
if exist w:\x.txt set drv=w
if exist x:\x.txt set drv=x
if exist y:\x.txt set drv=y
if exist z:\x.txt set drv=z
if "%drv%"=="" goto nodrv
goto drvcopy
:nodrv
echo .
echo .
echo .
echo There is not an x.txt on the backup drive. 
echo Please create the x.txt file in the root of the backup drive and run it again
pause
goto end
:drvcopy
cls
%drv%:
cd\
md %drv%:\3
robocopy c:\ %drv%:\3 /TEE /MIR /v /e /r:0 /w:0 /log:3.txt
goto end
:end