[megaloman]

Код:

@Echo Off 
	Set "TxtFile=Z:\Box_In\list.txt"
	Set "BoxOut=D:\Backup"
	Set /A MaxLen=3

	2>nul Md "%BoxOut%" 
	FOR /F "usebackq delims=" %%f IN ("%TxtFile%") DO Call :AddFile "%BoxOut%" "%%f" %MaxLen%
Exit /B

:AddFile
	If Not Exist %2 Exit /B 1
	If Not Exist "%~1\%~nx2" >nul Copy %2 "%~1\"
	Set /A N=10000000
	:Begin
		Set /A N+=1
		Call Set "OutName=%~1\%~n2(%%N:~-%3%%)%~x2"
		If Exist "%OutName%" GoTo :Begin
	>nul Copy %2 "%OutName%"
Exit /B