How can I tell if all USB-C ports on a 2020 M1 MacBook Pro are the same speed, or if one or more will be faster than others?
Apple Menu, &quot;About this Mac&quot;, &quot;System Report&quot;, &quot;Hardware&quot;, &quot;USB&quot; and you get a list of all USB devices connected with their speeds. If a device is not connected directly but through a hub, that will cause a little bit of time. If multiple devices are connected to the same hub, they will have to share the bandwidth - they will slow down if they are used simultaneously.
And one trap that might be misleading you: If a hub has only slow devices connected, then it will often report that it has the slow speed itself. So a USB 3 hub with only USB 2 devices plugged in may report that it is a USB 2 hub itself; plug in a USB 3 device and it changes to a USB 3 hub.