If you cannot find the specific split archive parts online, the most reliable way to update your firmware is through the TV's built-in system settings or by contacting the manufacturer directly. :

: Do not turn off the TV or remove the USB until the process is 100% complete, as this can permanently damage the software. Where to Find Firmware Files

Insert the USB into the TV's while the TV is off or in standby.

software update often requires access to specialized technician forums or direct support, as these files are frequently split into multiple compressed parts to manage large firmware sizes.