Can't Upload Files To FTP

I’ve been trying to upload game files for my Unity game but all exe, xml and dll files etc just instantly disappear to where I don’t know.
How so I fix this issue as it is preventing me from releasing patch updates and configs to my players

You can’t upload Windows programs to your website for security reasons. Your website hosting account should only be used for website files, if you want to share other files with players you should use a file sharing service (like Dropbox or Mediafire) for that instead.