Without nc-restore, You would miss users, so unless you have only 1 or two users, and recreate them manually.
Nc-restore will do that for you, when restoring the database, after which it will run nc-scan also.
The database will be rebuild/checked by nc-scan.
A (Linux) mointpoint is usually created at /media or /mnt, as in my example above
It is where external drives are connected to the system.
After my first successful restoring of a backup I have learned a lot and edited this wiki as well. Iām now 90% sure that this should work as it is now.
If you have a Pi 4 with the armhf (32bit) image consider testing this āhow-toā and give feedback. The worst that can happen is that you need to restore the full backup.
Well, I had some time to try my tutorial.
(I did it in my own test envirement, ethernet directly to my Mac, so I donāt have internet and also can not use the web pannel for some reasonā¦)
Anyway, I succeeded, and changed the 32bit image on the SD card with the arm64 image, restored settings, users and apps with nc-import-ncp & nc-restore (dataless backup).
As mentioned by @OliverV nc-scan is done automatically, so no need for that. I also did not do a nc-fix-permissions, but it canāt hurt if you do.
I have not tested for more than a few minutes, but all seems to work fine.
As an argument to use this method, restoring a full backup of 420 GB took about 10h. Following this tutorial with the same setup, took roughly 30min (19min of it to do the nc-scan).
Only there is one strange error when it was finished.
Has anyone tried this with server side encryption enabled?
I did it step by step like this and everything worked wonderfully. Thanks for that!
I am using a RP4 with 8GB RAM, runs flawlessly.
Now finally Collabora Online works for editing Office documents in the cloud.
I am very grateful to you for this!
MERCI! 
Thanks for the feedback, very encouraging to know that this has been useful to others.
First of all, thank you for your tutorial
after restoring my ncp-config_XXXXXXXX.tar
I have no access to my nextcloudpi (https://192.168.1.***:4443/) page or ssh access
Can you help me to find the solution please
Note: I have followed all the steps in the tutorial
Ć©dit___________________________
I have access to the nextcloud page (https://192.168.1.***/index.php/apps/dashboard/#/), with the ncp account
I did the update from ssh
here is the result
Running nc-import-ncp
Running nc-automount
automount enabled
Running SSH
New password: Retype new password: No password has been supplied.
New password: Password change has been aborted.
passwd: Authentication token manipulation error
passwd: password unchanged
file not found
Running unattended-upgrades
Unattended upgrades active: yes (autoreboot true)
Running nc-webui
Site ncp disabled.
To activate the new configuration, you need to run:
systemctl reload apache2
ncp-web disabled
Running nc-previews-auto
Automatic preview generation enabled
Running nc-httpsonly
Forcing HTTPS On
Running nc-notify-updates
update web notifications enabled
Running nc-backup-auto
automatic backups enabled
configuration restored
Sorry for not reacting, Iām back online after a long time.
so, you still donāt have access to the ncp web panel?
can you make sure that the web panel is enabled in the ncp-config settings (command line)sudo ncp-config
itās somewhere in the settings, not sure where exactly.
Iāll look at it the next time I try to do the migration.
Now I canāt
Thanks
On my current nextcloudpi which I have not updated, I have access to sudo ncp-config from the terminal with no problems and web panel is enabled
Sorry I did not read well your first post and did not realise that you also donāt have access to ssh.
what about if you donāt restore the config, but only the backup, is it still not working?
Honestly speaking Iām probably as helpless as you are.
Iām running nextcloud docker. How does this guide transpose if I want to move from a 32bits host to a 64bits host?
sorry for the very long time to respond. I never had to do that, so I cant give you a solid answer. So do your own research before doing this.
I donāt know your setup, but if you have al NC data on a separate disk, not the OS disk, you can probably just flash the 64bit OS of your choice to the host,
setup docker,
install NCP in a Docker container and mounting the NC data volume from your separate data disk.
Thanks a lot for this guide! This helped me much.
I have two remarks:
I had to start the wizard via https://nextcloudpi.local:4443/wizard, it didnāt start automatically.
Restoring the NCP configurations via nc-import-ncp broke the whole installation two times (maybe my ncp-config_XXXXXXXX.tar was corrupted), so the third time I just used the wizard and the menus in the web interface (admin panel) (https://nextcloudpi.local:4443) and made the modifications I needed. Took me less than twenty minutes.
