I have plugged in the GEM45 to a usb hub as advised, tried powered and not powered. Either the device won't register immediately and I need to restart Pi or services or the mount. Finally after registering it will work for a random period of time and then issue a 'Write Command Error: Write Error: Input/Output Error' - see attached the screenshot.
I then restart and may work again. After awhile it will do it again. I'm losing my freaking mind. Now after digging into the Pi's logs I can see at the exact same time the following: Ignore the times on this log but its the same at each time associated with the syslog.