How do I transfer roon backup on a pc external drive to a new nucleus?

The roon manual about setting up nucleus is not helpful.

I need to transfer backup from Windows PC external drive to a new nucleus?
How difficult to do? Can I do this through the networked Ethernet cable?

Has anybody done this?

How do I get nucleus to browse the external drive so I can select the backup file??

The NAS guidance in manual is horrifying to follow.

2 posts were merged into an existing topic: How do I access desktop ex5 hard drive from an iPad via roon to set up nucleus