принятое решение:
использование: moveit TargetFolder DestinationFolder NameOfTargetFolder
Образец: moveit C:\MyFolder C:\MySecondFolder MyFolder
moveit.bat:
Set target=%~1
Set destination=%~2
Set prefix=%~3
for /f "tokens=*" %%f in ('dir /b %target%\*.txt') do move "%target%\%%f" "%destination%\%prefix%_%%f"
for /f "tokens=*" %%s in ('dir /b/ad %target%\*') do call moveit.bat "%target%\%%s" "%destination%" %prefix%_%%s