Use the following commands depending on the task you wish to perform:
> execute backup config management-station <comment>
Or:
> execute backup config usb <backup_filename> [<backup_password>]
Or for FTP (note that port number, username are optional depending on the FTP site):
> execute backup config ftp <backup_filename> <ftp_server> [<port>] [<user_name>] [<password>]
Or for TFTP:
> execute backup config tftp <backup_filename> <tftp_servers> <password>
If you have a VDOM-type of configuration, use the same commands by first entering the commands:
> config vdom > edit <vdom_name>