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#11
This might be too complicated, but I use Amazon S3 and the Cloudberry Backup program to send import files to online storage. It can use Google and Azure as well. But it looks like you have a cloud-based backup? In that case you won't lose your files if the hard drive goes out.
I mentioned a full disk clone using AOMEI Backupper as a precaution for if and when the whole hard drive takes a dump.
A fireproof safe isn't necessary, but it's a nice thing to have in case of fire. It's also nice to have for important documents like a social security card, a homeowner's deed, etc. They only cost about $30. SentrySafe Fire Safe, Waterproof Fire Resistant Chest.17 Cubic Feet, Extra Small, H0100CG - Fireproof Lockbox - Amazon.com
The lock is very easy to get past so don't consider using it for that form of security. You'd want a vault that bolts to the floor for that.
Anyway...