Web Reference: Mar 9, 2026 · From time to time, an error occurs when working with CircuitPython. Here are a variety of errors that can happen, what they mean and how to fix them. If your host computer starts complaining that your CIRCUITPY drive is corrupted or files cannot be overwritten or deleted, then you will have to erase it completely. Only Adafruit Express boards and the SAMD21 non-Express boards ship with the UF2 bootloader installed. The Feather M0 Basic, Feather M0 Adalogger, and similar boards use a regular Arduino-compatible bootloader, which does not show a boardnameBOOTdrive. In this lesson I describe & show solutions for some of the most common CircuitPython install, board, and Mu problems that I've seen over the years I've spent teaching hundreds of in-person...
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