PC-3000 Flash. Monolith pinout determination guide. Variant 1 | PC-3000 Support Blog
Monolithic SD Cards Pinout – Data Recovery Is Possible - Aesonlabs®
PC-3000 Flash. How to recover data from a monolith (microSD card) | PC-3000 Support Blog
spi - Make an SD card installed on PCB readable through USB - Electrical Engineering Stack Exchange
Connect a microSD card to the ESP8266 or ESP32 using a microSD to SD adapter — Alex Lubbock
How to build a device to read SPI/SDIO input and convert to USB to read/write data onto a USB storage device from a 9-pin SD card interface? : r/embedded
U0909A (USB2.0 9 Pin Header to SD Card Reader)
Recover Data from SD card using USB Data cable (memory card) - YouTube