and if you want to do your back into the cloud (aws,dropbox,et.al.) (it’s encrypted. should be save.)
an example script for backup you’ll find here:
you have to adopt it. because it would set your nextcloud into maintenance mode and dump your database easy 10 min.
to backup your files folder each 10 min only should be ok since restic is doing a delta backup.
(i don’t like this bash scripts trying to do backup house keeping. )
)