Back up using SyncBack (Free).
Back up daily stuff to a USB stick; monthly to 2 x ext h.d, one just in my desk, but the other is in the safe; once or twice a year the safe hd is swapped for one that lives in the safe at my BiL's place, while they have a hd in mine as well.
Thinking of getting another hd / ssd for Son 1 to keep with him in Brisbane & bring down fortnightly