Nextcloud asked in a poll at https://mastodon.social/@nextcloud@mastodon.xyz/115095096413238457 what database its users are running. Interestingly one fifth replied they don’t know. Should people know better where their data is stored, or is it a good thing everything is running so smoothly people don’t need to know what their software stack is built upon?
I’m sorry, but writing down the data from your organizational program and re-entering it all from scratch is NOT a backup solution.
If you have such scant data to do that, you didn’t need to have nextcould installed in the first place.