Would be great to see an auto back-up option to back up the USB data drive to another external USB drive. Something that would act as an easy recovery if the original usb data drive fails.
This would include the option to remove the backup drive and keep it for safe storage and periodically plug in for the backup.
In addition to data and db backup, it would be nice to have a rolling backup for the RPI image. Something like a mirror image of Nextcloud PI, data and db that makes for an easy recovery.