I can't back up my iPhone simply becase there's no such option?

I can't back up my iPhone simply becase there's no such option?

Please help!
i go to: settings, apple ID, iCloud, manage storage, backups, my iPhone and then it says next back up: size 8.44 bak up size is 9.01gb and that it was never backed up. No other otions at all! I can't screenshot cause my button is smashed please help

Sucks.

Use iTunes