Completely unplug your Aconatic TV from the power source.
The correct (often labeled as MS638_PC822_Aconatic_49DSU800_part1.rar ). WinRAR or 7-Zip to extract the .rar package. Step-by-Step Installation Guide Download MS638 PC822 3840x2160 Aconatic 49DSU800 part1 rar
If you're still having trouble finding the exact file, you can check the Official Aconatic Support Page for the latest manual and software releases. Completely unplug your Aconatic TV from the power source
Plug the drive into one of the USB ports on the side or back of the TV. Download MS638 PC822 3840x2160 Aconatic 49DSU800 part1 rar