I have a PC running Windows 7 and a single internal HDD. Externally I am running three USB HDDs - let's call them Tom, Dick and Harry.
When I copy between Tom and Dick I have no problems. When I copy between Tom and Harry I get the message "Error 0x8007045D: The request could not be performed because of an I/O device error.
The same for when I copy between Dick and Harry. So it appears Harry is at fault.
I have reformatted Harry to NTFS, but this problem still occurs. I have a feeling this may be permissions or ownership?? I would be most happy if Harry was set to be free of any ties and OK to plug into any PC without read or write problems.