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.
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” .
Release both buttons. Use the Bottom Right button to scroll down through options. Stop on “Recovery Mode” .