Based on your request, the file is a firmware update file (likely V8-S68AT02-LF1V198.bin) designed for specific TCL TV models (E5900, E7800, H9800, Q7700, P2US series).
It is not a part of a multipart .rar archive, but rather a large .bin firmware update file. Download S68AT02 LF1V198 part03 rar
the USB into your TV (use the USB 2.0 port if possible). Unplug the TV from power. Based on your request, the file is a