Where does the image taken by ESP32 CAM get stored if I do not use a memory card?

Hi,
The esp32cam has extra memory included in the form of PSRAM
see: ESP32 - How To Use PSRAM • ThingPulse

Images you capture will probably be stored in SPIFFS
see: SPIFFS in ESP32

BTW - I found it difficult myself to find out how to do the basics with the esp32cam so I put together this demo sketch: GitHub - alanesq/esp32cam-demo: esp32cam module demo / shows how you can easily use the esp32cam including reading raw rgb data, streaming, displaying the image etc.(ArduinoIDE or PlatformIO)

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