In the webadmin device tree, find your share. Check the field PK_User (I think), what is it set for? It should normally be set for LMCE structure (something like that). Sorry about being vague, I'm not at a system right now to verify these settings.
You should never access your drive through /mnt/device/128.
Always access files through /home/public/data/audio/<device>/ or /home/public/data/video/<device>/ , etc.
Thanks for your help, I checked and it is already selected to LMCE structure. I always access the files via /home, It was just to mention the real path, but thanks anyways for the guidance.