Release the button when the "Software Upgrading" or "Loading" progress bar appears on the screen.
Since your query mentions "part3," you must follow these steps to get the usable .bin or .img file: Release the button when the "Software Upgrading" or
The firmware for this board is often split into multiple compressed parts due to its size (Android-based boards can be over 500MB). TP.MS338.PC821 Resolution: Release the button when the "Software Upgrading" or