Are you trying to , install a custom ROM , or fix a boot loop on your device? m20-m30-bootloaders_and_modems/README.md at master
This is the standard "loader" for Samsung devices. You can download the stable Odin v3.14.1 to flash firmware files onto your device. Download M20 Loader zip
Open Odin, connect your device, and place your .tar file into the BL or AP tab as instructed by your firmware source. Are you trying to , install a custom
Download and install the necessary Samsung USB Drivers to ensure your computer recognizes the phone. Open Odin, connect your device, and place your
Specific bootloader files for the M20 (often provided as .tar or .zip ) are used to update or downgrade the device's low-level software. A collection of these can be found in the haridhayal11 GitHub repository.
Switch off your phone and use the Volume Down + Home + Power buttons (or follow specific model shortcuts) to enter Download Mode .