Hello. I have heard of a hardrive with a terrabyte capacity (around 1,000 GB), but I have never heard of tetrabyte. I have several friends who built their own computers, with 2+ CD/DVD burners. As well for gaming (I rarely play computer games >;P) I would suggest purchasing a Intel Duo Core Extreme if they still sell it at a retailer. I personally use a Intel Pentium 4 with 3.00 Ghz and I found that it runs smoothly after half a decade. I have played Halo 1 on my XP... and it took a thousand MBs. What you purchase it totally up to you. Hope this helps. >:D