Surface Book 3 card reader stopped working - any help?

Hello Reverend Rod,

Thanks for reaching Microsoft Community. We're sorry to hear about this issue on your device.

Were you trying to connect to the USB port on your device? When did this issue start? Were there any changes made on the system settings prior this issue happen?

In the meantime, please try these methods and check if issue persists or not:

1. Force a shut down and restart your Surface. It resets the hardware and clears all the cache and memory for your hardware.

2. Run the Surface Diagnostic Toolkit and check for Windows Update. Ensure all pending updates are installed.

3. Manually install drivers and firmware for Surface

   • Check what is the current OS Build of your Windows version by typing winver on the search bar near the Windows logo.

   • Go to Download driver and firmware for Surface, choose (your Surface model) then click Download.
     Choose the .msi file closest to your current OS Build and click Next.
     After downloading, run and install the .msi then Restart. 

4. Run the System File Checker in Windows (microsoft.com).

I hope this helps. Feel free to respond on this thread to let us know how it goes.

Best regards,

StevenK