If your TV is connected to the internet, follow these steps to check for official updates directly: How to Update Hisense TV
The file "Download Hisense UHD Smart 55N3000UW Go to product viewer dialog for this item. Download Hisense UHD Smart 55N3000UW part3 rar
part3 rar" likely refers to a split-archive firmware update for the Hisense 55N3000UW If your TV is connected to the internet,
To update your television, you should first try the official over-the-air (OTA) method, which is the safest and easiest way to ensure you have the correct software. Download Hisense UHD Smart 55N3000UW part3 rar