This article explains how to update a Samsung smart TV. Instructions apply to most models made after 2013.
How to Update the Software on Your Samsung Smart TV (and Get the Latest Features)
The best way to keep your Samsung Smart TV up to date is to set up automatic updates. This way, you can set it and forget it; updates will arrive as you use your TV and will be completed the next time your device is turned on. Here’s how to turn on automatic updates:
Make sure your TV is connected to the Internet.
Go to Settings > Support > Software Update.