I am using HSPI pins 12,13 and 14 to connect with Sensor and I see the problem flashing code into PICO-D4.
How to isolate IO12 till boot is finished? I am not sure If I have any free pin available to control any transistor or something.

Well IDF:
https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/sdio_slave.html

So it is possible. Not sure about Arduino.
Why - 'I am looking forward for interface other than SPI'?
Be good to understand your thinking.
I would say that you're main throughput ...

Hi,

I am looking forward to connect SDCard to log data. I am looking forward for interface other than SPI.
Can we do SDIO or any other interface for the same?

Any library available for the same? I have used sdfat-beta in other application but not sure if the same is going to work with ESP32 or ...