The file refers to a specific firmware part for the TP.SK708D.PC821 Go to product viewer dialog for this item.
: Features a quad-core processor (often the T972 or A35 chipset), with memory variants of 1GB/2GB RAM and 8GB/16GB storage. Download SK708D PC821 3840X2160 REF80 part03 rar
The specific file you are looking for is part of a firmware package used to resolve issues like "logo hang" (boot looping) or to properly align the board with a new 4K panel. The file refers to a specific firmware part for the TP