Yes, the drive is showing in Finder, added a folder MUSIC\FLAC and copied all the files in then added this folder in ROON it took 3-days to scan as there are 11,500 files totalling 363GB and if I click to Force Rescan it now has no work to do so all looked fine until trying to play any in ROON.
Do you keep your drive connected to the Mac? Adding files to Roon doesn’t really transfer the files, it only lets Roon know where the files are so it can reach them and scan them.
If so, you still can’t see any album on Roon’s home screen?
Arlen, yes its permanently connected the QNAP NAS allocated 4TB of space to a dedicated iSCSI LUN and on the MAC KernSafe runs the iSCSI Initiator and this works fine for everything but ROON.
Arlen, thanks for adding the link and surprised that the poster seems so down on iSCSI LUN they are used extensively in business as Altaro and VEEAM onsite backup storage areas as they are created on a Corporate NAS with the data protected by (often) RAID10 and over a good LAN you dont see any difference between this and a local drive.
Once setup on the NAS the macOS just sees a new drive and then formats as normal. ROON sees the storage once its added and spends the time indexing the files then they just dont show on the GUI.