Newton's Theory of Gravity states that every object in the universe pulls on every other object. Every object feels this force, so it is a universal force. The force is always attractive; it is always a pull, never a push. Picture the force of gravity as the tension in an imaginary rope between two objects.
The whole point of a USB drive is to store lots of data in a small space, so think about what kinds of files you'll want to house on your flash drive. Movies and music take quite a bit of space, so if you're carrying your whole entertainment library with you, you'll want a big thumb drive â at least 16GB.
This means that the external drive, at its heart, is a laptop HD... and the largest laptop HD currently available is 1.5TB. But since you asked for USB 3.0, here's a list of 1TB external, bus-powered, drives: http://www.newegg.com/Product/Pr...