how i do backups
important data lives on the devices that use it first: my phone and laptop. selected folders sync to the NAS with Syncthing so they are easy to access elsewhere, and my personal laptop also backs up to it through Time Machine.
the NAS itself is backed up to Google Drive. that works well for now because it is a student account with a lot of discounted storage, but the discount will expire soon, so I will need to rethink that part of the setup.
there is no RAID or other storage redundancy yet. storage is expensive right now, so the setup is focused on backups rather than high availability. redundancy is still something I am considering as the system grows.