Ensure you have part01.rar , part02.rar , etc., in the same folder on your PC.
the physical Power button on the TV (not the remote). While holding the button, plug the TV back in . Ensure you have part01
The TV will usually restart automatically once the bar reaches 100%. Ensure you have part01.rar
If you tell me your TV is showing (e.g., stuck on logo, no backlight, or "file not found"), I can provide more targeted troubleshooting. How to update any Samsung TV's firmware using a USB drive stuck on logo