Like the Model A & B, the B+ requires a FLASH card to store the operating system and files. The Model A and B had an SD socket on the bottom:
The SD card stuck out the end of the Pi, and could come loose or snap off by accident with enough force.
The new B+ replaces the large SD socket with a new MicroSD socket
The good news for any Adafruit customers, we always had dual Micro/Standard SD cards so you can still use the same cards! Just discard the adapter.
This guide was first published on Jul 14, 2014. It was last
updated on Nov 18, 2018.
This page (Card Socket) was last updated on May 04, 2015.