Device sync to nextcloud -> rsync data & db onto NAS -> nightly backup to rsync.net and quarterly offsite/offline HDD swaps.

I also copy Zoneminder recordings, configs, some server logs, and my main machine’s ~/ onto the NAS.

The offsite HDD is just a bog standard USB 4TB drive with one big LUKS2 volume on it.

It’s all relatively simple. It’s easy to complicate your backups to the point where you rely on Veeam checkpointing your ESXI disks and replicating incrementals to another device that puts them all back together… but it’s much better to have a system that’s simple and just works.