Instructions shared by a customer - https://parsons-technology.com/how-do-i-update-my-lg-firmware/
It some websites it calls for the firmware to be put in a folder called “LG_DTV” but that was for old firmware (Pre 2.x). This was what was causing our problem in updating the televisions. We had to use a folder named LG_MONITOR.
Below is a picture from the actual LG site.