Alright hopefully someone out there can help me. So a quick recap of what I'm using. quad 2.5 ghz g5 mac running os 10.5.8. All I am trying to do is transfer ISO disc image over to an external Usb Hard dive. Any time I attempt to drag the file over I receive an error that says " Sorry, the operation could not be completed because an unexpected error occurred. (Error code 0) Any information would be greatly appreciated thank you in advance.