When backing up your stuff, keep it simple. I made the mistake of trusting a hardware NAS with four drives in a Raid 5 setup. It eventually stopped responding because the hardware driver was cheap crap and it cost me several hundred bucks to get my stuff off of it. I now use a bunch of portable drives and back up EVERYTHING each month to two drives. This means that my important stuff is in three places. I have one collection of scans that's also on my internet computer making a total of four backups.

I use this program for backing up ( https://freefilesync.org/ ) because it's free, simple and fast. When I travel away from home, I take one copy of my backups with me. I keep another copy hidden behind the canning and preserves under the stairs in an old safe. No one would look there for valuables but it's mostly in case of fire. Ideally you keep a copy at your neighbours place. When I was working it was easy to let the IT folks take care of that stuff.