Datasheet

Easiest Way: Use storage.erase_filesystem()

Starting with version 2.3.0, CircuitPython includes a built-in function to erase and reformat the filesystem. If you have an

older version of CircuitPython on your board, you can update to the newest version (https://adafru.it/Amd) to do this.

1. Connect to the CircuitPython REPL (https://adafru.it/Bec) using Mu or a terminal program.

2. Type:

CIRCUITPY will be erased and reformatted, and your board will restart. That's it!

Old Way: For the Circuit Playground Express, Feather M0 Express, and Metro M0 Express:

If you are running a version of CircuitPython before 2.3.0, and you don't want to upgrade, or you can't get to the REPL,

you can do this.

1. Download the correct erase file:

https://adafru.it/AdI

https://adafru.it/AdJ

https://adafru.it/AdK

https://adafru.it/AYe

https://adafru.it/DjD

2. Double-click the reset button on the board to bring up the boardnameBOOT drive.

3. Drag the erase .uf2 file to the boardnameBOOT drive.

4. The onboard NeoPixel will turn yellow or blue, indicating the erase has started.

5. After approximately 15 seconds, the NeoPixel will light up green.

6. Double-click the reset button on the board to bring up the boardnameBOOT drive.

7. Drag the appropriate latest release of CircuitPython (https://adafru.it/Amd) .uf2 file to

the boardnameBOOT drive.

You WILL lose everything on the board when you complete the following steps. If possible, make a copy of

your code before continuing.

>>> import storage

>>> storage.erase_filesystem()

https://learn.adafruit.com/adafruit-feather-m0-express-designed-for-circuit-python-

circuitpython

Page 87 of 199