Copy file on remote FTP server

Hi, I would like to copy all files to a backup folder on the FTP server before I download and delete the files.

I'm using the following command lines to do this.
But i get this error message:

Operation not supported.

How does the CP command work ?
Perhaps there is a other command to backup files before downloading files?

Most SFTP servers do not support copying the files:
https://winscp.net/eng/docs/protocols#duplicate

If you have a shell access to the server, you can use shell cp command via WinSCP call command:
https://winscp.net/eng/docs/scriptcommand_call

I have never used a Shell command - always used .bat/txt files. How should then script be written and how do I execute the shell command?
I have to be able to execute it from i.e. a command prompt - is that possible?

Just prefix your cp command with call command, like in my example above.

Though actually, you will need to remove the operation mask from the destination path, as the shell cp command does not support it. And it is not necessary anyway: