Because this specific file is part of a split RAR archive (part 7), you generally need to download all parts from the same source to extract the firmware successfully. You can typically find these files on:
: While they often provide the latest full USB recovery images, they may not list older or multi-part archive versions on their public landing page. Download RT2861V09 3840x2160 16G Kivi 49UP50GU part07 rar
: Many TV repair groups host split archives for Realtek-based boards like the RT2861. Important Precautions: Because this specific file is part of a
: Since the file is a .rar part, use the latest version of WinRAR or 7-Zip to merge all parts. Place all files (part01 to part07) in the same folder before extracting. Important Precautions: : Since the file is a
: A primary source for board-specific firmware. You may need to pass a brief technician's test to create an account and download files.