usb not showing all music

I love volumio but i have music on USB sticks and Volumio will only show some not all albums. Some titles show but are empty. I have attempted to rescan and update but nothing happens. Using Raspberry pi 3 , justboom amp and volumio 2. My USB are cruzer.

  • Have you checked permissions and user group ownership?
  • Possibly, are the filenames made of special characters?