Hi @Denis_Fiallos,
Roon does not have a folder browser (there is a feature request for this here). That means music files that you organised in folders won’t have that level of organization in Roon.
If you have duplicate albums in Roon, I am assuming that they there are also 2 copies on your NAS.
Take a look at the file info within Roon of each album and check their storage location. Just click the 3 dots-menu and select “View File Info”.
You can also have the file location displayed in the “Track” section. Click the arrow and enable “Path” there.
