Step by step instruction for a system backup ABB irb6400 S4

Is this what you are looking for ?

If it is S4 then it depends on what robotware version. Only very late versions had the backup option - you will see the option in service\ file if it s present.

Otherwise save all your parameters through ' system parameters'
Then in programming window, view 6. Modules then 'save all modules as.... ' to a floppy disc (every module in the list including base and user).
Then to be 100% sure go to the file manager and copy all modules on ramdisk to a folder on a floppy disk.

You are basically doing everything manually that a backup does in s4c+ to its various folders such as syspar, rapid home etc. (s4c didn't backup any ramdisk files)

Backup to the ram disk, then use FTP to retrieve a copy. I prefer Filezilla.