Troubleshooting Transfer

No CPLAYBOOT drive

Make sure to press the reset button once when connected to turn on the CPLAYBOOT drive.

Multiple downloads

You can’t drag and drop more than one .uf2 file at once onto your Adafruit Circuit Playground Express. If you try to drag and drop a second .uf2 file onto your Adafruit Circuit Playground Express before the first file has finished downloading, then the second file may fail in different ways.