Thunderbolt / USB 4 - What ports are really used by the M1 MacBooks?

The new M1 based MacBooks (and the Mac Mini) include at least two Thunderbolt / USB 4 ports. But what exactly are they? Thunderbolt 3 or Thunderbolt 4? What is USB 4? Let's find out. Thanks to Larry from OWC: https://www.owcdigital.com/ Introduction to Android app development: https://www.dgitacademy.com Let Me Explain T-shirt: https://teespring.com/gary-explains-l... Twitter:   / garyexplains   Instagram:   / garyexplains   #garyexplains