CR-10 S5 with BTT SKR E3 mini v3.0:

BLtouch v3.1 (conneted to the Z endstop pin)
Stock LCD (connected to the LCD's EXT3 spare port, with one single straight ribbon cable)
Bondtech or stock extruder
Bowden setup
All 4 fans are PWM controlled.

Flashing Mainboard Firmware

The bootloader which handles flashing new firmware on this board remembers the last filename you used.

Where to put the firmware file on the SDCard:

Put the firmware.bin file into the root folder.