Backup only when changes were made [same as cisco archive functional]

[ant]

Hello, I've googled a lot, also I have checked topics about backups on this board, but still unable to find is there solution for fortigate which would be similar to cisco archive functionality?

I have configured "set cfg-save manual" and now I need to backup config automatically to my TFTP server after "exe cfg save" command. I don't need to backup it every 30 seconds/minutes/etc. Maybe I could use some kind of command aliases (have no idea is it possible with fortigate) when one command triggers configured earlier command list?