Does it let you restore content from it or is it only backing up?
Self hosting my own #nostr relay thanks to nostr:npub126ntw5mnermmj0znhjhgdk8lh2af72sm8qfzq48umdlnhaj9kuns3le9ll
Feels good.
Discussion
I believe it will always sync the backed up data with the nostr network so your data should always be available from some instance, provided your server is running at the minimum.
Above my pay grade but that’s how I understand it.