Hi @johnbor
Yes PAD flows are stored on OneDrive or Dataverse depending on which account you are using.
But you cannot use these physical files to back them up.
In the Cloud Flows portal you can create a zip file in the Solutions section. This zip file can also be emailed or stored on your disk as a physical copy.
Or in the PAD Flows Console there is a create a copy option which can make use of. This copy will be created within the same environment.