Roon (Nucleus+) Dilemma

I recently purchased a used Nucleus+ at a reasonable price. It was a good news/bad news transaction. The bad news was that setting it up for myself as the second owner was a bit of a challenge The good news was that the internal 2 1/2tb SSD contained some 1,500 albums! Not being a new setup Roon did not look over my network for music files.and I had to go to storage in settings to manually add my NAS. This I did by clicking on add a folder, then add network share and inserting the path to my NAS (\\TS1200D2D0\share. Worked fine and I was pretty proud of myself for like many other 86 year old's I  not very computer literate. or like them much for that matter.Then I encountered the following difficulty. I also have several hundred albums on a Sony HAP-Z1ES . Ideally I would like Roon to utilize these files as well. The path to my music there is: Network > HAP-Z1ES > HAP_Internal > RV2, with individual files in RV2. I have tried entering the following paths:
\\Hap-Z1ES
\\Hap-Z1ES\share
\\HAP_Z1ES_HAP_Internal_RV2
No matter what I have tried I get a "Path not valid" error message

I have a very will informed friend who says Roon simply will not access these files. I am not sure he is correct for the Nucleus, the Sony, and my Cary DSM-600 streamer/DAC are all connected to my network. I can see that by looking on my computer. Further, I can depress the Network button on the Cary remote, select any of the music files on the Sony, and play them! So if the Sony can see the files and play them I can't see why Roon won't.

Obviously. either my friend is correct and "you can't get there from here" or I am not smart enough to get the pathway correct

This is driving me nuts and Roon Labs has been of no help. I could REALLY use some of your collective expertise!