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” .
Whether you’re troubleshooting persistent glitches, preparing your watch for a new owner, or simply want a fresh start, a hard reset (factory reset) on the CASIO Pro Trek WSD-F20 restores the device to its out-of-the-box state. Unlike a simple reboot, this process erases all user data, accounts, and downloaded apps. How to Hard Reset CASIO Pro Trek WSD-F20
Read the warning. Tap Reset Device or Confirm . Keep both buttons pressed for about 5–7 seconds
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. Unlike a simple reboot, this process erases all