HW (HardWare) Info files are required to generate licenses in the ARRI License Shop or may be requested by camera service to get detailed information on the camera's hardware and components revisions.
Menu > System > Licenses > HW Info or Menu > Info > Export HW Info.
CONFIRM to export the HW Info file.ARRI/ALEXA35/LICENSES named ALEXA35-HW-#####-YYMMDD-HHMM.json (##### = camera serial number)