Backup MCD.cmd

@echo off

REM Change this to where you want the files backed-up to...
REM (Always put a backslash at the end so xcopy knows you want to create a directory)
set dst="%USERPROFILE%\Backups\Minecraft Dungeons\"

set srcdir="%LOCALAPPDATA%\Packages\Microsoft.Lovika_8wekyb3d8bbwe\LocalCache\Local\Dungeons"
if exist %srcdir% goto find_subdir
set srcdir="%LOCALAPPDATA%\Dungeons"
if exist %srcdir% goto find_subdir
echo Could not find Minecraft Dungeons Save directory
goto exit
:find_subdir
for /F "tokens=*" %%F in ('dir /B %srcdir% ^| findstr /R /C:".*[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]"') do set src=%%F
if not "%src%" == "" goto backup
echo Could not find Minecraft Dungeons Save sub-directory
goto exit
:backup
xcopy /S /Y %srcdir%\%src% %dst%
echo These files were saved from directory %srcdir%\%src% > %dst%\README.txt
:exit
pause

This will backup your Minecraft Dungeons save files to the cloud (or whereever). See this reddit post.