SparkFun microSD Transflash Breakout - BOB-00544 - SparkFun Electronics

Breakout board for the microSD socket that is not much bigger than your fingernail. Compatible with the SPI interface found on any SD card, this tiny form

SparkFun RJ45 MagJack Breakout - BOB-13021 - SparkFun Electronics

BOB-11570: TRRS connectors are the audio-style connectors that you see on some phones, MP3 players and development boards. TRRS stands for Tip, Ring, Ring, Sleeve, which reflects the fact that, unlike a standard stereo connector, this actually has three conductors and a ground. Some devices use the extra conductor for a microphone (like hands-free headsets) or to carry a video signal (like in some MP3/MP4 players).

SparkFun TRRS 3.5mm Jack Breakout BOB11570

microSD Shield - DEV-09802 - SparkFun Electronics

COM-15051 SparkFun

BOB-00544 SparkFun Electronics Prototyping, Fabrication Products

Cant initialize SD card on Mega Pro 3.3V - Storage - Arduino Forum

SparkFun microSD Transflash Breakout - BOB-00544 - SparkFun

Using SD Cards on Arduino Giga? - GIGA R1 - Arduino Forum

Micro SD card breakout board - Micro Robotics

microSD USB Reader - COM-09433 - SparkFun Electronics

microSD card module with Arduino DUE - Arduino Due - Arduino Forum