Help me to access my files on external HDs - Semi-Solved

Blender is not able to open my external hard drives.
UPDATE: I can now open one of the drives. I don’t know what changed.

I’m no longer looking to pay for help, but if you do know why Blender would fail to be able to open external hard drives, please let me know.

I use a Mac. Blender cannot see the contents of one of my external drives.

I’ll include a screenshot of what I see. I have three drives, my mac’s HD, and two external ones. If I choose File: Open, I get the three options, but I cannot open either of the external HDs, one of which is the one Drop Box is using.

If you know how to resolve this issue, please let me know.