I honestly do not know what to make of the names that Thinktank gives its bags, so I won't spend too much time on it. But the Thinktank StreetWalker HardDrive is a well structured large backpack with room for almost all the gear a person might realistically be able to carry on their back without regretting it almost immediately: interior dimensions are approximately 16x28x46cm. Oh, and there's an immense laptop sleeve for good measure. It's a big pack, and it's in excellent condition, with only minor cosmetic wear and plentiful dividers.