Okay, I found a workaround — imperfect, but I'll take it.
I can transfer these "problem" files from the WD drive to my laptop without any problems at all, and then transfer them from the laptop to the OWC Mercury drive — again without any problems.
I'm in the process of...
I just bought a 2TB OWC Mercury Elite Pro drive. And I'm passing data (mostly video) onto it from a WD MyBook drive. Both use the Journaled HSF format. I'm on a MacBook Pro (10.5.8).
Problem? Every so often I get a message saying "The Finder cannot complete the operation because some...