Can I plug a USB-C device into a Thunderbolt 4 port?
Yes, a Thunderbolt port will negotiate data rate, power and video capabilities with the connected device and "fallback" to the USB protocol if the device is not Thunderbolt-enabled. This fallback mode also allows a Thunderbolt device to be connected to a non-Thunderbolt USB-C port and still function, albeit at a USB3 level.
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