A couple hours ago, I began moving everything from my 250Gb external to my 1Tb external, which brand-new. It's taken forever, because the transfer speed is horribly... but anyway, it got to a certain point where it gave me an error because it apparently ran out of space. HUH? How can a 1Tb HD run out of space from transfering less than 250Gb into it? I checked, and sure enough, it says that there is 826Gb left... but no matter what file I try to add to it, it keeps saying there isn't enough space left. What in the world is going on?