Adafruit microSD Card BFF Add-On for QT Py and Xiao

Our QT Py boards are a great way to make very small microcontroller projects that pack a ton of power - and now we have a way for you to add a ton of storage, for reading and writing, with a micro SD card slot that can fit on the back of your miniature dev board. It uses the three SPI pins plus one chip select pin to access megs or gigs of data.