Trying to better understand USB DVD writer and capabilities on USB 2.0 versus USB 3.0 Port

Way back in 2011, I bought a Buffalo DVD Writer which was USB 2.0 and it had main data + power and also an Aux power cable. So it needed two USB ports to work. It also had an LED indicator that would turn Red if it was not getting enough power. Eventually it failed and found its way into e-waste. Recently I purchased an unbranded (Pop Up Mobile CD Writer Model ECD829) from Amazon. The writer is working fine when connected to USB 3.0 port. The device comes with USB 3.0 A as well as USB C plug. The product page on Amazon says USB 3.0. The box also mentions USB 3.0 written on it. However, when I

Question by rajeev on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.