Can't see my USB Drive runnning LMS with PiCorePlayer ....................

I have a Raspberry Pi that I use with a USB Drive for Travel. I run LMS on it and have a USB Drive Plugged into it.

I got a new USB Drive and thought I would test it out with the Rpi with LMS on it. LMS is running fine, Squeezelite is running fine.
I cannot See my USB Drive on the LMS tab however to 'mount' it. I have re-installed LMS, installed additional filesystems.

tried re-booting it a number of times, but no luck .... Can't see the USB Drive.

Any ideas.