I don't know I just manually manage everything on my computer. I have a older computer that I use as a NAS that has all solid state storage in it which is a mix

I don't know I just manually manage everything on my computer. I have a older computer that I use as a NAS that has all solid state storage in it which is a mixture of SSDs and NVMe storage and it runs RockStor. As I know I'm going to need something I just throw it in my NAS. Over time when I need space I will throw in my Intel ARC A750 to transcode movies or TV shows I have downloaded to AV1 using Staxrip. No set bit rate for that because that is stupid and inefficient. Read about the codecs that exist for audio and video and once you learn about them you know how to correctly use them and you could use a quality setting instead and get more efficiency. When thinking about a backup system you can get really caught up in the weeds with having automation and scripts and these fancy ideas of cold storage going to an external drive and then synchronousing with a cloud service and then setting up another thing that will automatically synchronize what's on your disk with a close friend that you have who also has a big NAS for a second off-site storage... None of this matters if you have never actually tested a scenario where you need to get your data back on whatever devices that end up failing. Before things get too bad, simulate a drive failure on your main computer. What would you do if you had to restore things? Once you've worked backwards from the best way for you to actually get back whole and working then I think you will be able to answer your own question on ways to manage backup.