@Snow123 - As this this in-place upgrade that is you're upgrading an
existing aem instance, it will have all the data in it already and node/
data stores will be upgraded as well.There is no need for any othe
backups except you would backup this instance at all steps to prevent
loss in case of issues. You should also have a content freeze (i.e. no
content changes) once you begin with these steps.