Ok, cannot move files from EHD... Hmmm let me think some more. It has to be ,somewhere ... In shared files ...or admin rights for them.
What happens if you double click on a locked folder?
I do enjoy a challenge.
From what I am reading could very well be your ehd needs to be re-formatted. As I wrote, a change can do weird things.
See if this helps
April that's what mine was doing before it died.