The only question is if your whole node goes down, where is the information stored / backed up as to which backup is the most recent or whether there were any channel state updates after the last backup?
You can connect a cluster of computers to each other, each with the node state, so that if one goes down, you can simply restore it from another machine.
I would've also suggested storing it in the cloud, but I'm assuming you're only interested in decentralized solutions.
That's all basically already possible by mounting a network drive for your backups.
It is recommended that you use a network-mounted filesystem for the backup destination. For example, if you have a NAS you can access remotely.
The backup plugin also allows to use multiple destinations, e.g. a secondary drive (local redundancy), a NAS within the LAN and another somewhere else (remote redundancy).
Sadly, no built-in encryption == no cloud backups are recommended.
Do note that files are not stored encrypted, so you should really not do this with rented space (”cloud storage”).