I cant find the answer, How can I disable requiring password to mount Flash drive, Just plug USB and open folder without password.
pmount could be your new buddy.
pmount is a wrapper around the standard mount program which permits normal users to mount removable devices without a matching /etc/fstab entry.
sudo apt-get update; sudo apt-get install pmount
I have updated RPI to a newest version and now this error is no longer occurs with the connected device via HDMI (PI user does not require password authorization). But still requires password authorization when connecting via the VNC-server