You should open notepad and just hold down the A button until there are 100 or so A's on the screen. Then, highlight them all and press CTRL+C, and then press CTRL+V, and continue holding down CTRL+V until there at least 1000 A's. Then, highlight them all and press CTRL+C, and then press CTRL+V, and continue holding down CTRL+V until there at least 10,000 A's. Then, highlight them all and press CTRL+C, and then press CTRL+V, and continue holding down CTRL+V for about an hour or so, you can just put some kind of weight on the keys if you want to get up and do something while the file is expanding. After about an hour of this, the file should much excede 600gb, and then you can go buy another 600gb hard drive and do this all over again. Have fun.