Don't. Just don't. G502 HERO firmware update through G HUB is broken. Waited for over 1.5h with the mouse "updating" and not working, and at the end had to disconnect and reconnect
Logitech G502 X Lightspeed review: Improving a favorite - Reviewed
Logitech G502 HERO High Performance Gaming Mouse
Logitech G502 HERO High Performance Gaming Mouse - UK