There may be a few reasons why you can't copy or move a file: Processing, Action Required, publish status for a role with Manage permissions, or a sorted folder view.

• You can check if there are files still processing by going to the Processing section in the Shortcuts in the Documents tab. Files must complete processing before you can move or copy the folder
  
• Files that didn't process will be listed in the Action Required section of the Shortcuts. These files need attention before the folder can be copied or moved
  
• If you are a Reviewer with Manage Permissions, Move or Copy isn't available when the content is published
  
  • Unpublish the content before moving or copying 
    
  • If you are a Reviewer with Manage Permissions you may need to speak to a Project Admin to extend your Feature Access permissions to allow unpublishing
    
    
• Folder contents that display in the center panel may have been sorted. Review the column headers to see if the arrow appears next to any of them, and click until they arrow is removed. After being unsorted, the content is moveable again