I use 'three' depending upon what I store.
I've got a 'partial' backup going on my file/media server(~50TB and ~20TB from raid 6)
From there, I've got a 'real' backup computer with 3.5" drives in 4TB+ that I can remove/store for slightly larger files. I'm transitioning to this from external USB drive(1TB) This would be music, photo and movies. Music and movies are backed up mainly for convenience... ultimately, I've got original media stored elsewhere.
From there, I've got thumb drives for smaller but important files like reg keys, program downloads, etc.
Personally, I don't trust cloud anything. I've heard too many horror stories of companies just closing up at midnight and/or going 'ransomware'. My moto is if it isn't something I physically control, I have no control over any issues.