Computer: MacBook Pro purchased in November 2008 External drive: Western Digital 1 TB MyBook, purchased in November 2008 Cable options: A. USB 2.0 B. FireWire 800 9-pin (on MacBook Pro side) to FireWire 6-pin (on external drive). I don't know if the WD MyBook is FireWire 400 or 800. USB 2.0 is intolerably slow. Will FireWire be faster? I would have to abort a copy operation which has already taken 7 hours by USB, though nothing has been written to the destination drive yet. It is still "estimating time remaining". "Preparing to copy" took 6 hours, it has been "estimating time remaining" for 1 hour. The target drive has not spun up at all yet, it is still totally blank.