# usermod -aG disk <user>
# vim /etc/polkit-1/rules.d/10-udisks2.rules
ADD THE FOLLOWING
// See the polkit(8) man page for more information
// about configuring polkit.
// Allow udisks2 to mount devices without authentication
// for users in the "wheel" group.
polkit.addRule(function(action, subject) {
if ((action.id == "org.freedesktop.udisks2.filesystem-mount-system" ||
action.id == "org.freedesktop.udisks2.filesystem-mount") &&
subject.isInGroup("disk")) {
return polkit.Result.YES;
}
});