I am replacing my external drive and plan to copy the old drive to the new one using the instructions in this forum. One thing I did not see in the instructions was how long it takes. I will be copying a 750 GB drive that is 44% full using the eSATA connections on my desktop PC. Does anyone have a general idea of how long it might take? I want to do it ASAP because the old drive is messing up so bad, but will wait until after tonight's shows to start if it is going to take many hours. Thanks.