The file appears to be a segmented firmware update for the Nikai UHD55SLED3D

If you tell me the you're looking for this file, I can help you with: Troubleshooting a specific error (e.g., stuck on logo) Finding the remaining archive parts Verifying your TV's mainboard compatibility How to Update Smart Tv Software by Usb @KazmiElecom

While specific instructions for Part 3 are not standalone (all parts must be downloaded and extracted together), the standard process for Nikai TVs includes: