To upload a new program to ESP32, you need to erase the Flash Memory on a PC ESP32 Card. This article shows how to do that using CMD.

You'll also find a course that teaches you how to program ESP32 without traditional coding. By the end of these courses, total beginners will know how to use microcontrollers with confidence.

The Internet of Things & ESP32 Arduino Beginners Course Bundle Takes a Deep Dive into Games & Electronics Building with 7 hours of content.