Create files automatically

create_files.bat

SETLOCAL ENABLEDELAYEDEXPANSION
@echo off

set numfiles=%1
set maxfilesize=%2
set destination=%3
if not defined destination set destination=C:\temp\

for /l %%x in (1, 1, %numfiles%) do (
    SET /A randomsize=!RANDOM! * %maxfilesize% / 32768 + 1

    for /f %%A in ('powershell !randomsize! * 1048576') do (
        start /B CMD /C CALL fsutil file createNew %destination%File%%x.tar %%A
    )
)