How can I update my TV that is running android OS 4.2.1

I have a TV from the brand "Haam". It's supposed to be smart, but recently I couldn't use any app. Nothing works on it. I can only watch regular channels from satellite. I want to update the TV software, but the only way to update it is by using USB. The following figure shows the system details: This is my first time to update a TV. I don't have the experience on this. Please, I need your help and advice in this regard. Thanks in advance.