Duplicates the given file or folder. Accept the regular copy command parameters as well

dup.cmd

@echo off
rem if you want, you can change the cp command to the regular windows copy or xcopy or whatever copy command you like

for %%a in (%*) do set last=%%a
set source_file=%last%
set /a count=2
set all_params=%*

if exist "%source_file% - Copy" (
	call :set_first_available_name "%source_file% - Copy (%count%)"
) else (
	cp %all_params% "%source_file% - Copy"
)
goto :eof


:set_first_available_name
IF EXIST "%source_file% - Copy (%count%)" (
	set /a count+=1
	call :set_first_available_name "%source_file% - Copy (%count%)"
) ELSE (
	call :do_copy
)
goto :eof

:do_copy
cp %all_params% "%source_file% - Copy (%count%)"
goto :eof


:eof
exit /b