When you are in a recruitment company, you should learn to pack your backpack. You don't have that big bag. It's called a camouflage backpack in the army. In order to exercise your quick movements and basic skills, you are generally not allowed to use that backpack in the recruitment company. You must pack your own backpack.

However, you generally don't need to carry a backpack after leaving your job, and you can stuff it directly into your backpack.