Backup User Profile in BAT file

I would like to add the "My Documents" folder to the list of files that are backed up in this script.

I would also like to back it up to a UNC path or mapped drive.

Can anyone help with this?

:: ========================================
:: BKUPUSER.BAT
::
:: Copy user data to C_BACKUP\%ComputerName% folder
:: ========================================
@echo off

:: ----------------------------------------
:: Initialise Variables
:: ----------------------------------------
set PstFolder=%userprofile%\Local Settings\Application Data\Microsoft\Outlook
set Nk2Folder=%userprofile%\Application Data\Microsoft\Outlook
set FavoritesFolder=%userprofile%\Favorites
set SignaturesFolder=%userprofile%\Application Data\Microsoft\Signatures
set BackupFolder=%userprofile%\My Documents\c_backup\%computername%

:: ----------------------------------------
:: Prepare Folders
:: ----------------------------------------
md "%BackupFolder%\pst" 2>nul
md "%BackupFolder%\nk2" 2>nul
md "%BackupFolder%\signatures" 2>nul
md "%BackupFolder%\favorites" 2>nul
 
:: ----------------------------------------
:: Copy PST Files
:: ----------------------------------------
echo Copying PST files....
xcopy "%PstFolder%\*.pst" "%BackupFolder%\pst\" /y /q /r >nul 2>&1
if %errorlevel%==4 (
   echo.
   echo You must close Outlook before backing up it's PST files....
   echo.
   pause
   exit /b 4
)
 
:: ----------------------------------------
:: Copy NK2 Files
:: ----------------------------------------
echo Copying NK2 files....
xcopy "%Nk2Folder%\*.nk2" "%BackupFolder%\nk2\" /y /q /r >nul
 
:: ----------------------------------------
:: Copy Favorites
:: ----------------------------------------
echo Copying Favourites....
xcopy "%FavoritesFolder%\*.*" "%BackupFolder%\Favorites\" /y /r /q /s /h 1>nul 2>errors.txt
 
:: ----------------------------------------
:: Copy Signatures
:: ----------------------------------------
echo Copying Outlook's signatures....
xcopy "%SignaturesFolder%\*.*" "%BackupFolder%\signatures\" /y /q /r >nul