Generate-dummy-big-file.ps1

 try
{
    $fs = [System.IO.FileStream]::New('c:\tempfiles\largefile.txt', [System.IO.FileMode]::Create, [System.IO.FileAccess]::Write, [System.IO.FileShare]::None)
    $fs.SetLength(2 * 1024 * 1024 * 1024 -1)
}
finally
{
    if ($null -ne $fs -and $fs -is [System.IDisposable])
    {
        $fs.Dispose()
    }
}