Utilising the snappily titled Sunton ESP32-2432S028 EVB ... secret strings are stored as plain text files on an SD card, so moving from one physical device to another and adding new services ...
It also has all of the I/O you would expect something based on an ESP32 to have, such as I2S stereo DAC, an I2S microphone input, I2C GPIO extenders and, of course, a built-in MicroSD card reader.