{"title":"Adafruit microSD Card BFF Add-On for QT Py and Xiao","handle":"adafruit-microsd-card-bff-add-on-for-qt-py-and-xiao","url":"/products/adafruit-microsd-card-bff-add-on-for-qt-py-and-xiao","description":"The Adafruit microSD Card BFF Add-On slots onto the back of any QT Py or Xiao board, adding a microSD card slot for megabytes or gigabytes of file storage. Using the SPI bus (MOSI/MISO/SCK) plus one chip select pin, you can read and write files for data logging, audio playback, image storage, and more.\n\nThe BFF (\"Best Friend Forever\") PCB is designed to match the QT Py/Xiao footprint exactly. Solder it directly for a permanent, ultra-compact stack, or use pin and socket headers to make it removable. Since the QT Py already operates at 3.3V, no level shifter or regulator is needed.\n\nKey Features\n\n\nMicroSD Card Slot – High-quality Molex push-pull socket for any SPI-compatible microSD card\n\nQT Py / Xiao Compatible – Fits directly on the back of any QT Py or Seeed Xiao board\n\nSPI Interface – Uses MOSI, MISO, SCK, and one chip select pin\n\nConfigurable Chip Select – Default is TX; solder jumpers available for RX, A0, or A1\n\nNo Level Shifting Required – Designed for 3.3V QT Py/Xiao boards\n\nCompact Form Factor – Matches QT Py footprint for minimal size\n\n\nIdeal For\n\nData logging to removable storage on tiny projects\nAudio file playback from microSD\nStoring images, fonts, and configuration files\nAny QT Py or Xiao project needing file storage\n\n\nPackage Contents\n\n1× Adafruit microSD Card BFF Add-On (assembled and tested)\n1× Header strip for soldering\n\n\n\nNote: MicroSD card and QT Py / Xiao board not included. Works with any standard Arduino, CircuitPython, or MicroPython SD card library.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":1757,"title":"Default Title","sku":"AF-5683","price":5.64,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}