Using this backpack is a breeze. First, unzip the various pockets to store your items. You can put your daily essentials like keys and wallets in the small inner pockets, while larger items like books or laptops can go in the main compartment. The side pockets are great for holding water bottles or umbrellas. To charge your devices, simply connect your power bank to the built - in detachable USB cable. When it comes to maintenance, clean the backpack with a damp cloth regularly. Avoid using harsh chemicals as they may damage the waterproof canvas. Also, don't overstuff the backpack to prevent damage to the reinforced edges and steel frame. And always remember, the power bank is not included, so you'll need to bring your own for charging.