Скачать или смотреть How to (not) blow up your external USB-C drive. Chipmunk USB-C Tester and USB-C Protector.

Plugging in an external USB-C drive (SSD or USB stick) into your USB-C equipped MacBook can be very dangerous.
The A4629 Chipmunk USB-C Protect saves the day. It will protect your external device even when the Mac is outputting 20 volts on the USB-C bus.

You can use the Chipmunk USB Tester to see if the 5 volt on the USB bus is correct. Especially in the case of USB-C this is important because if the CD321x is dead that could result in 20 volts on the USB bus, killing everything you plug in...
The Chipmunk USB Tester is a simple to use tool that gives you information about the USB Port. It only takes 2 seconds to plug in and every once in a while it will help you a lot.

Links to the products shown:
https://www.cmizapper.com/products/us...
https://www.cmizapper.com/index.html