Windows batch file to backup Pool of Radiance and Gold Box Companion folders

backup-por.bat

: Backup "Pool of Radiance" and "GBC" (Gold Box Companion) root folders
: to a specified location.
: Requires 7zip.

@echo off

set sevenZipExe=D:\Program Files\7-Zip\7z.exe
set porPath=D:\Program Files (x86)\GOG Galaxy\Games\Pool of Radiance
set gbcPath=D:\Program Files (x86)\GBC
set backupPath=D:\Users\gglas\Downloads\backup

set cwd=%cd%

: get timestamp in YYYYMMDD-HHMMDDSS format
set timestamp=%DATE:~10,4%%DATE:~4,2%%DATE:~7,2%-%TIME:~0,2%%TIME:~3,2%%TIME:~6,2%
: when %TIME% is less than 10th hour, it will have a leading space.
: replace the space with a zero
set timestamp=%timestamp: =0%

set backupPorPath=%backupPath%\Pool-of-Radiance\%timestamp%
if not exist "%backupPorPath%" mkdir "%backupPorPath%"

cd /D "%porPath%\.."
"%sevenZipExe%" a "%backupPorPath%\Pool of Radiance.7z" ".\Pool of Radiance"

cd /D "%gbcPath%\.."
"%sevenZipExe%" a "%backupPorPath%\GBC.7z" ".\GBC"

cd /D "%cwd%"