/mnt/INTERNAL permissions issue

Hi,

Tried to search but nothing good came up. Latest Volumio release, fresh install.

Connecting over SMB, I can create new folders, but not copy any new files to INTERNAL share. Same when I connect over SCP. Only way how to get files to internal storage is copying them to home folder and then moving folders to /mnt/INTERNAL manually from there.

Am I missing something or is it known issue? Any solutions?