Hard Drive Capacity

Assuming that this product will be a hit, my company will need a website to process orders and keep track of shipments and the like. To process and store all of these purchases, i'll need a server with enough RAM and hard drive capacity. With the up and coming concept of mass-produced computers with Terabyte drives, it would seem logical to start off with one of those. It would help to stay ahead of the game and allow more shipments to be processed a day thus, increasing profits.