[megaloman]

Код:

@Echo Off
cls
	Set "Src=Z:\Box_In\Мой контент\Книги"
	Set "Mask=File_2018-10-??_Original."

	Set "Dst=Z:\Книги.arc"

	Set Arc="C:\Program Files\WinRar\WinRar.exe" a -r -dh -m3 -s -rr5p -ts+ -y
	Set "Ext=rar"

	Set "LastDir="
	For /F "usebackq delims=" %%d IN (`2^>nul Dir "%Src%\%Mask%" /A:D /B /O:N`) DO Set "LastDir=%%d"
	If "%LastDir%"=="" (Echo Folder not Found "%Src%\%Mask%\" &Pause &Exit /B 1) 

	If Not Exist "%Dst%" Md "%Dst%"

	Pushd "%Src%" &&(
		If Not Exist "%Dst%\%LastDir%.*" (Echo "%Src%\%LastDir%\" &%Arc% "%Dst%\%LastDir%.%Ext%" "%LastDir%\")
		Popd
	)
pause
GoTo :Eof