With the TV unplugged, insert the USB. Hold the Power button on the TV (not the remote) and plug the TV into the wall. Keep holding it until the software update screen appears or the standby light begins flashing rapidly.
.rar (part 01), indicating the full software package is split into multiple compressed parts that must all be downloaded to extract the final firmware file. Finding the Download With the TV unplugged, insert the USB
The filename describes the software environment for the TV's internal hardware: With the TV unplugged
This file reference points to the system firmware for a Nordmende ND50KS4100 With the TV unplugged, insert the USB