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.
4K UHD Smart TV. Because firmware files can be large, they are often split into multiple compressed parts (like .rar or .zip) that must all be downloaded and joined before they can be used for a manual USB update. Guide to Updating Your Hisense 55N3000UW
If your TV is connected to the internet, follow these steps to check for official updates directly: How to Update Hisense TV
part3 rar" likely refers to a split-archive firmware update for the Hisense 55N3000UW
The file "Download Hisense UHD Smart 55N3000UW Go to product viewer dialog for this item.
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