If you want to perform a manual update of the firmware on your Samsung smart TV follow the instructions provided below.
https://ukwuakitv.zendesk.com/hc/en-gb/ ... -Smart-TV-
Samsung smart TV manual firmware update
Re: Samsung smart TV manual firmware update
What if it doesn't recognizes the firmware?, I downloaded the upgrade and unzipped it in an empty formated USB key, then I did the process as mentioned on the video and the answer I get is: No update files found on your USB device. Please check it and try again. Can you help with that?