If you plan to upload files containing sensitive information and would like an added level of security, you can enable this option in Direct FTP. Navigate to File > Manage Servers, click More Options, and select one of the secure protocols from the provided drop-down list (SFTP over SSH, FTPS over TSL/SSL, FTPS over SSL, or FTPS over TSL). The port number will automatically change depending on which protocol you select, so all that's left for you to do is connect!