When you transport a laptop from place to place there are usually other items that you need to carry along as well. If you choose a bag, your carry-along space is more limited. You have to consider the weight of the items because you will be holding the bag in one hand the entire time. The flat nature of laptop bags allows them to carry the laptop, cords, and a few other flat items. Laptop backpacks, on the other hand, can carry quite a few other items along with the laptop. You can pack more heavily because the weight will be distributed between your shoulders. Laptop backpacks have a wider shape, and can accommodate larger items.