Bvckup (not a typo)
Made by a little Swiss company, extremely light but very competent. Stays completely out of your way unless it absolutely must get your attention (which is usually never).
I think it’s paid only but it’s very reasonable. Works great in intermittent situations, I. E. It won’t blow up if it tries to run a scheduled backup and the source or target is disconnected etc… Works very well for me for a decade.
We got warnings of this in my area, but we just barely missed the danger zone I guess. All we ended up with was a few days of steady rain. Seems it got a lot worse elsewhere…