My monitor, Curved Gaming Monitor CHG90 Series. I tried to upgrade firmware latest version, m-HG949CCAA-1021.0[B835].bin and it kept says "No valid update files found. Please check your USB device and try again." Also I tried two different USB flashdrive, and made sure it has MBR and FAT32. I'm sure I plugged it in USB 1 port on monitor as I followed instruction manual. Someone can help me?