That is how much "raw" data is waiting on the new World Wind Central servers to be processed and added into the World Wind ZoomIt! layer.

This includes imagery from the USGS, all of Pennsylvania at high resolution and several other sources.  Once this is all processed it will only take up about 700-800GB of space, they they can start downloading again.  I believe there is about 6TB of total space, with room to add more hard drives.

I will check and see how Gigs of imagery we have on the World Wind Central web site.