Fix is as following: - Lower the communication frequency as the breadboard does not seem to be compatible with the default 20MHz for example, use the following: sdmmc_host_t host = SDSPI_HOST_DEFAULT(); host.max_freq_khz = SDMMC_FREQ_DEFAULT/2; // <- added line, SDMMC_FREQ_PROBING could be used too ...

When I use a couple of 16GB SD sards with an ESP32-WROOM-32 that I have an SD Card adapter connected externally I get the same issue (5v:0x107, 3v:0x108). Following is tried GPIO connection and slot_config values slot_config.gpio_miso = 2 slot_config.gpio_mosi = 15 slot_config.gpio_sck = 14 slot_con...