Need to migrate/backup Nextcloud

I am running Nextcloud 22 as a snap on Ubuntu 20.04. I need to migrate this to another server and am unsure about the best way to do that. Ideally, I could wait for the backup extension of Nextcloud 23 but I don’t know when the snap gets updated. I have different user accounts running and all of them have their own files, so I cannot simply re-install Nextcloud and re-upload all files. Ideally, I would like to move the whole installation.

I found different tutorials in the internet but maybe someone can point out which one I would need to use in my case?