Cannot copy files to DriveStation Duo - HELP!

[brainfreeze]

   

I'm working on a newish iMac that's running Leopard, Mac OS X Version 10.5.5. I've been successfully copying files (big & small, mostly video) to my DriveStation Duo 500GB drive for many months. Now all of the sudden I cannot even though there is still 337GB available. I just tried copying a 7GB .mov file & keep getting error message "Sorry, the operation could not be completed because an unexpected error occurred. (Error code 0)." I tried other .mov files as well in case there was a problem w/the 7GB file but nothing else would copy either. Restarting both the computer and hard drive did nothing.

 

HELP!!

 

Thanks :)

[Paul]

What file format is the drive in?  Buffalo sells the drives in Fat32 (that only supports up to 4 gigs)

you may want to format the drive with your Mac.