Tap Disconnect & reset (may also appear as “Factory data reset”).
Release both buttons. Use the Bottom Right button to scroll down through options. Stop on “Recovery Mode” . How to Hard Reset CASIO Pro Trek WSD-F20
Keep both buttons pressed for about 5–7 seconds. You will see the CASIO logo , then a black screen with white text: “Recovery Mode” or “Bootloader” . Tap Disconnect & reset (may also appear as
Read the warning. Tap Reset Device or Confirm . Stop on “Recovery Mode”
Scroll down and select System .
The watch will reboot into a new menu with an Android robot lying down. Now, press and hold the Top Right button, then press and release the Bottom Right button once while still holding the Top button. Finally, release the Top button.
Press and hold the Top Right button for about 10–15 seconds until the screen goes black and the watch vibrates. Release immediately. This forces a power-off.