If you want to use FTPS (implicit mode) with WiFi FTP Server app, use the steps in this video. Use a client like FileZilla or WinSCP. Make sure to use the ftps:// prefix in FileZilla for implicit SSL and ftpes:// for explicit SSL
Get WiFi FTP Server Pro app from: https://play.google.com/store/apps/de...
FileZilla client from: https://filezilla-project.org/
Free version of the WiFi FTP Server app from: https://play.google.com/store/apps/de...