@zedleb I do not really unterstand the point. The uploaded workflow cannot run on its own and refers to a path that is not present.
My sample was intended on providing an idea how to set such a thing up. You would need to provide a list of workflows you would want to store.
In general my suggestion would be to familiarise yourself with KNIME and the KNIME Hub.
Then (as mentioned before) there is the:
about how KNIME handles paths and file systems.
In general this ‘make your own’ backup thing is more like a demonstration it could be done, but may also lead to a false sense of security since there is no real substitution for a solid backup strategy that would include versioning and complete distaste recovery (disk is damaged/lost).