TMcK

I got the same message today 5/18/16. Was this question ever answered? Failed to open. The 8T Thunderbolt Duo/PhotosLibrary...... The file could not be opened because permission was denied. WHAT???? I can import files into my messages, my email, my other applications so I just don't understand. Please help.

My Photos library is stored on an external thunderbolt hard drive on my MAC. When I click on Photos it takes a while but selections finally come up however when I select the date file that I want, the pictures never show up. I do have roughly 75,000 pictures in my library but they are all divided up by year and then sectioned into specific events by date. I did click on just a one picture file and the picture is grayed out and never shows up. Please see the attachment below. Thanks for any help or explanation that you can give me.