I was in the middle of a game download when I received a disk write error. I noticed that my hard drive I was writing to suddenly read 0 bytes free of 931 GB and said NTFS underneath. I can still open the HD and explore all folders. All files are still intact and I can play files from it. I deleted approx. 10GB of unnecessary files thinking maybe I had really used all the space. It still won't write and displays 0 bytes free. Any ideas on what's happening?