I have problem with .bat script android

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Android

batch

hello everyone first sorry for my bad english

I`m a beginner of batch script and I like to use it to many things for example
I need the bat script to put files to android phone for example galaxy
I need put files to system and replace system file no problem with root or no
and I tried to use some command but i can`t pass :(

I used same command on bat but when the permission was changes my script was stopped

I used this commands

@ECHO OFF

echo Android Chmod changer Tool											
pause.
goto menu


:menu									
cls
echo.
echo.
echo.       = Menu =
echo.
echo.
echo   [1] chek device											
echo   [2] go to device
echo   [3] Root pirmission
echo.
echo   [4] go to directory
echo   [5] pirmission chnge bootsamsung.qmg
echo   [6] pirmission chnge bootsamsungloop.qmg
echo.
echo.
echo.
set /p choice= Enter your number:

if '%choice%'=='1' goto chek device
if '%choice%'=='2' goto go to device
if '%choice%'=='3' goto Root pirmission
if '%choice%'=='4' goto go to directory
if '%choice%'=='5' goto pirmission chnge bootsamsung.qmg
if '%choice%'=='6' goto pirmission chnge bootsamsungloop.qmg

goto menu																

________________________________________________________

:chek device
cls
echo.
echo Your device will cheked									
echo.
pause

adb.exe devices

pause
goto menu
________________________________________________________

:go to device													 
cls 														
echo.
echo.
echo.					
pause

adb.exe shell

pause
goto menu													
________________________________________________________

:Root pirmission
cls
echo.
echo.
echo.
pause

adb.exe su

pause
goto menu
________________________________________________________


:go to directory
cls
echo.
echo.
echo.
pause

adb.exe cd system/media

pause
goto menu
___________________________________________

:pirmission chnge bootsamsung.qmg
cls
echo.
echo.
echo.
pause

adb.exe chmod 775 bootsamsung.qmg

pause
goto menu
________________________________________________________

:pirmission chnge bootsamsungloop.qmg
cls
echo.
echo.
echo.
pause

adb.exe chmod 775 bootsamsungloop.qmg

pause
goto menu									

________________________________________________________



and when I manually use the commands I can`t change chmod or delete any system file
please help me
thanks