Pi Pico not Mounting in Bootsel Mode

When working with the Pi Pico, I ran into this issue and spent too long debugging. This is what worked for me:

  1. Go into Device Manager
  2. Under the COM ports, find RPI Interface 0
  3. Right click and choose Update Driver
  4. Then search manually and find USB Mass Storage
  5. and that’s it! It should recognize the Pico now as a mass storage device.

Consider setting up a Picoprobe for easier breakpoint debugging too: https://github.com/raspberrypi/picoprobe

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