For USB Devices: Use the HxC USB management software to flash the firmware.
file acts as the initial "bridge" software. It is flashed directly onto the drive's microcontroller (typically an STM32 or AT32 chip) to replace the factory firmware with the HxC bootloader. Once this bootloader is installed, the device can then be updated easily via a standard USB stick. Installation Overview Hardware Connection Hxc-fw-installer.hex
Since you didn’t specify your (e.g., HxC2001, HxC Rev C, Gotek with HxC), I recommend checking the official HxC Floppy Emulator forum or the HxC_Firmware_User_Manual.pdf that came with your download. If you share your hardware details, I can give more precise steps. For USB Devices: Use the HxC USB management