If you use SqlBak to send backups to FTP Server, you can face a problem when though the connection seems to work, the file transfer doesn’t.
error
The media family on device is incorrectly formed
“The media family on device is incorrectly formed. SQL Server cannot process this media family.” is not an error that will help you pinpoint exactly what has gone wrong.
This post will try to give you a few suggestions as to what might have gone wrong and what to do in those situations.