Using SD card with another SPI device - Programming Questions - Arduino Forum
Lecture 12: SPI and SD cards
Treedix 10pcs Module Mini TF Card Read and Write Micro SD Card SPI Int – Treedix Official
Digital Sound Recorder Using DAC with the tinyAVR® 1-series
I2C SD Card Interface - Hackster.io
The different between SD card and MMC is initialization process. The communication protocol of SD card includes SD bus and SPI. - Bulk Memory Card Storage