10,000 files limitation is a ftp configuration setting. You can set it to higher or lower if you change the setting in your ftp software and/or the server. The FileZilla program states in its support forums that it has no limitation. Meaning, the issue you had was most likely the server was set (usually at a default limit) to truncate the directory listing for.... directory listing speed. You still have access to all the files in the directory. And the server has zero issues dealing with them. In this case, SSH is your friend to access the server via SSH CLI.
