i was playing my campaign which was interrupted due to electricity shutdown in my house
i was playing with the save cloud option
i cant recover my campaign but a save is still present in my computer
need help !

I know in the past if I have a cloud save and the local is corrupted it asks which I would like to sync with. Surprised that doesnt fire with the inverse.

And that does stink. At least the good news if you lose it you can be more efficient in the next run!

Inside each save folder there is a subfolder called 'backup'. If you copy all the files from the backup folder into normal save folder (replace what is there), you can recover your save.

This. Although I have learned from experience that it IS possible for the backup to be erased as well, if you're really unlucky.