Once the update reaches 100%, the unit will reboot itself. The first boot may take several minutes. Troubleshooting the Update Process
Copy the update file directly to the root directory of your FAT32-formatted USB flash drive. Do not put it inside a folder. Yt9216bj-00012-v001 Update
If you can tell me your or the issues you're experiencing , I can provide a more tailored guide . yt9216bj - XDA Forums Once the update reaches 100%, the unit will reboot itself
If your unit is currently functional, this is the easiest way to check for official updates. Once the update reaches 100%