Thank you for your help. It is an internal drive. It just “disappeared” yesterday. It was not on the desk top and it didn’t appear in my admin window as it normally does. Also, none of the files in my open project were digitized anymore. I re-booted several times and nothing happened. This morning I re-booted one more time……and there it was. My media drive re-appeared on the desktop and in the admin window. And yes, it does appear in the Disk Utility folder. I checked my project and the files are restored.
I’ve been editing on this Media 100 version and this Mac for nearly 5 years now and this is the strangest thing I’ve seen. I’m still not sure what happened.
Again, thank you very much for taking the time to help. It is very much appreciated!