I save my original path in originalPath and then move to another folder. At the end when I do cd %originalPath%, it doesn\'t work. It stays in the
Actually it does not really stay in the changed directory. The real problem is that setlocal, besides environment variable changes, caches the current directory, which you already changed by cd %myPath%.
Then you switch back to the former directory by cd %originalPath%. But as soon as the batch script finishes execution, an implicit endlocal occurs which resets the current directory to the one previously cached by setlocal.
The issue is exactly the same if you remove REM from the pushd and popd lines and comment out the cd lines instead.
To solve the problem, simply move the cd %myPath% line (or the pushd command) down below setlocal. Actually you do even not need to store the current directory initially when you change it only in between the setlocal/endlocal block (even if endlocal is not explicitly stated):
@echo off
set myPath=Subfolder1
set folderList=input.txt
setlocal EnableDelayedExpansion
REM pushd %myPath%
cd %myPath%
:process
REM The rest of my script
REM popd
pause
endlocal