Use the KIVI Software Support Page where you can enter your TV's serial number (found on the back of the device) to receive the exact, validated firmware for your specific model.
All parts (part01, part02, etc.) must be in the same folder. Extracting part01 will usually combine them into a single file (often named MstarUpgrade.bin or similar). Download RT2861V09 3840x2160 16G Kivi 49UP50GU part08 rar
Format a USB drive to FAT32 and copy the extracted file to the root directory. Use the KIVI Software Support Page where you
Do you have the of your KIVI TV to verify if this is the correct version for your specific hardware? Software - KIVI Download RT2861V09 3840x2160 16G Kivi 49UP50GU part08 rar