Ans: You should always make sure that the bag or backpack you choose is going to be comfortable to carry. It shouldn’t be too heavy, and it shouldn’t be too light either. I would like to tell you how much camera gear I want to carry in my camera bag, and also try to keep its size small and its weight as light as possible. Obviously My Camera( Canon Eos 90D) Extra Batteries Sony lenses 28-70 Wide-angle lens For My 90D My Go-Pro with its accessories such as a Floating handle, Remote, and tripod. Charging cord for my Phone, Camera, and Go Pro. Extra SD card for camera (Sandisk Extreme) Recommended I also carry a massive 12000 MAH battery for backup and other gear I carry in my backpack.   Note: If you prioritize the outer padding then point out that the internal space of a highly padded camera bag would be significantly smaller than the outer dimension.