Right-click Part 1 and select "Extract Here." Prepare USB: Format a USB drive (8GB or less) to FAT32 .
You must have Part 1, Part 2, and Part 3 in the same folder. Download MS338 PB802 1920x1080 512M REF48 part3 rar
Since these are technical files usually hosted on technician forums, check these reputable sources: A popular site for China-made TV software. Lab-One: Specialized in LED TV firmware archives. Right-click Part 1 and select "Extract Here