Hi @satsnakamoto,
On the relay side you could do something like
sudo ~/umbrel/scripts/stop && tar -cvzf nostr_backup.tar.gz ~/umbrel/app-data/nostr-relay/data && sudo ~/umbrel/scripts/start
And then to unpack on new instance
sudo ~/umbrel/scripts/stop && tar -xvzf nostr_backup.tar.gz -C ~/umbrel/app-data/nostr-relay/ && sudo ~/umbrel/scripts/start