The '''supported upgrade path''' should be for example; ''ownCloud 8.2.1 => Nextcloud 9.0.54 => Nextcloud 10.0.1''. This works flawlessly. The steps that follow are not '''not guaranteed''' to work for every new upgrade instance of Nextcloud 10. ownCloud 8.2.1 is the earliest release tested. If the upgrade steps do not work for a new upgrade instance you will have to start with a complete new installation. The Nextcloud Community will not help with issues where an upgrade step was skipped.

'''NOTE: ''' The section for Backup and Recovery of ownCloud/Nextcloud has been updated, please read carefully!