If every time you upload a file to the server, it becomes empty or zero bytes after it is uploaded, it is most likely because of a personal firewall setting that you have on your computer.
To fix the problem, either configure your personal firewall to allow your own FTP connection, or disable your firewall while you are FTP’ing.
If you are having trouble configuring or disabling your personal firewall, please contact the manufacturer of the firewall software to assist you.
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