Thunderbolt 3 Transfer Rate. The thunderbolt 3 host connection. The actual data transfer rate depends on many different factors.
Whereas thunderbolt 3 has minimum support of 16gbs for pcie connections thunderbolt 4 will boost this to 32gbs. Since thunderbolt 3 is backwards compatible to usb all thunderbolt 3 cables will work as usb c cables too. When it comes to usb4 which uses the same usb c connector speeds top out at 20gbs with 75w of power delivery and support for a single 4k display.
The thunderbolt 3 host connection.
Indeed thunderbolt 3 is a superset of usb c. The attached device must support those speeds eg a thunderbolt 3 external hard drive. Esata can deliver 6gbps older versions deliver 15gbps or 3gbps usb 30 runs at up to 5gbps and the incoming. You now know that at maximum 125 mb of the file will transfer every second.