Okay here goes: I have 2 Internal Hard drives. One is a 1TB with ~500GB stored. The other my C: is 160GB. I'm copying all the files from my 1TB Hard Drive to a 1TB External. When it gets about 80GB Full, it says "Cannot Copy ____ because there is not enough space" or something along those lines. I know that it does have more space. Seeing as how they're both 1TB it shouldn't do this right. I mean, I could understand if one is a 1TB, and the other a 40GB. Oh, yeah: They're both Western Digital drives also.