All devices backup to my NAS either in realtime or at short intervals throughout the day. I use recycling bins for easy restores for accidentally deleted files.
My NAS is set up on a RAID for drive redundancy (Synology RAID) and does regular backups to the cloud for active files.
Once a day I do a hyperbackup to an external HDD.
Once a month I backup to an external drive that lives offsite.
Backups to these external HDDs have versioning, so I can restore files from multiple months ago, if needed.
The biggest challenge is that as my NAS grows, it costs significantly more to expand my backups space. Cloud storage and new external drives aren’t cheap. If I had an easy way to keep a separate NAS offsite, that would considerably reduce ongoing costs.