HUB 2.0 USB Port Speed - Anyone Know?

Anyone know what real world max speed is of the combination Pi 3B + HUB 2.0 USB Port that is inside the pi-top[3] ? I am sticking with a PI3B+ in there and am wondering if I can get a speed boost from an external (internal?) USB 3.0/3.1/3.2 drive attached to the hub’s port, ideally, for a fast / faster boot drive.