I also use Proxmox Backup Server to backup my VMs. These and the files of my NAS get copied on one of two 22TB HDDs, which I swap out weekly from my fireproof safe. My PC files get synced on my NAS through GoodSync and my Smartphone NeoBackups via Syncthing. My PC also does a Disk2VHD image every month and TrueNAS keeps daily snapshots for two months.
I lost 2TB of data about 15 years ago, I vowed to never let this happen again