Keep meaning to log this here, as I seem to have to do it every time I do a command line installation. For some reason, USB devices – flash drives, USB hard drives etc, refuse to mount, even with Thunar and volman installed. A repair is required to the PolicyKIt.conf as follows:
sudo nano /etc/PolicyKit/PolicyKit.conf
and add the following lines in between the <config> tags:
<return result=”yes” />
You will possibly need a reboot to get this working right.
Now your USB devices should automount correctly