Hello everyone, I have a transcend external HD with about 85 GB free.

When I try to copy something onto it which is larger than 1gb, it says that the disk is full, which is clearly not the case because I have 85 GB free. This however doesn't happen when I'm copying something from a CD or DVD on to it. Only when I'm copying from a drive to it.

What could be wrong and how do I solve it? Thanks a lot.