Putting your board into UF2 Bootloader will force your board to restart and present you with a USB mass storage device in your file explorer – assuming you have the UF2 bootloader still installed and you have not stomped it by flashing Arduino, MicroPython or IDF code on the board.
All Unexpected maker ESP32-S2 and ESP32-S3 boards ship with CircuitPython and the UF2 Bootloader installed by default.
To get your board into UF2 bootloader mode:
- Press and Release [RESET]
- When the RGB LED is turns purple, Press and Release [BOOT]
You should now be in the UF2 bootloader mode. You will then see the RGB LED on your board turn green once the filesystem is mounted.