Look at:
http://anappleaday.konceptus.net/posts/900gb-usb-drive/

"A friend of mine went to China recently, and came back of course with some goodies and sweet stuff. But one thing he brought back really intrigued me. It was a little piece of technology. You can see it in this picture: a SONY, VAIO-branded USB drive with a mind-boggling capacity of 900GB, and it not only says that on the outside. If you plug it into your computer, it will really show 900GB of free space. Now, he hasn’t been able to actually store this much on it so far. After storing a few GBs, he reported, if you add more data, the old files you just put on it start disappearing. When I tried the drive myself, I didn’t get as far even. When I plugged it into my desktop, Explorer just crashed, and eventually had to restart the box to restabilize the system. On my laptop I got similar results (both run Win XP Pro), even though it did not crash until I tried to create a folder on it (copying simply failed with a message like “Make sure the disk is not full or write-protected”). In short, it’s certainly not very portable if at all usable. Until we figure out how to store 900GB on this thumb-sized device, we should give it to the Chinese ingenuity. Hats down, really! They not only produced a cool-looking USB drive that boasts a 900GB on its titanium-finished cover, they went the whole way and modified the hardware so that it makes you computer think that it does have this much space on it. It even allows you to keep copying stuff on it (on some computers, apparently), even if you exceed whatever real capacity it has. The funny thing about this story is how much it cost: my friend bought it on the Pearl Market in Beiging for some bargaining and $7 (50 yuan)."

No such thing as a Sony Vaio 900 GB.....Welcome to Pirate China.