Offsite backups

I use a NAS to host my own files, using a RAID and snapshots, productivity is somewhat ensured, however, immutable backups is also one of my needs, what if ransomware happens or my house burns down?

For that I use Backblaze B2, directly from my QNAP with HBS3, but also trough rclone inside a VM, as HBS3 doesn’t support hiding files and thus the data would be ever growing.