> All these things compounds if the NAS is not just for you, but your wife, kids, family, etc. Now it becomes your responsibility that all these precious data and photos entrusted to you are 100% safe for the decades to come.

A NAS is not a backup? It's hot storage.

I have a NAS but I backup my photos on AWS in S3 Deep Glacier. It costs me less than $1 a month for 500GB of pictures. That's a backup.

If it is secondary place to store and has some archiving/delete protection it is a backup.

If it is only place you store your data sure, you need another option to backup the NAS itself