Download of long files with WinSCP very slow, compared to FileZilla

The download of long files with WinSCP is very slow. A 300 MBytes file has taken a couple of minutes, with FileZilla it was downloaded within 4 seconds.

With WinSCP, the download accelerated to high speed when about one half of the file was downloaded.
See a zip of the log files in the attachment.

Thanks a lot for your support.

I saw the solution

disable Connection -> Optimize connection buffer size

in another thread. That was it!

Nevertheless, it may be a good idea to optimize that specific option.

Where is this option, please?

@DeagleDogs: See https://winscp.net/eng/docs/ui_login_connection