Volumio 2.323 (latest) running on Raspberry Pi3
Audio files are distributed across three folders, stored on an USB drive that is inserted directly into the Raspberry Pi3
In my ‘Music Library Settings’, Sort Artists By = albumartist.
In the ‘Albums’ view, albums are sorted by ‘album artist’
Albums are sorted first by folder (as stored on the USB drive) and within each folder by ‘album artist’