Amazon.com: GODSHARK 7+17 pin mSATA to A1398 A1425 (2012 & Early 2013) Adapter for MacBook Pro Retina SSD Replacement, Mini PCIe SATA SSD Converter Card : Electronics
How to install an SSD on a 15-inch Retina MacBook Pro
How to Upgrade the SSD on a MacBook Pro Retina Early/Mid/Late 2013/2014/2015 - Replacement Tutorial - YouTube
How to Upgrade the PCIe SSD in a 15-inch MacBook Pro w/ Retina display (Late 2013 - Mid 2015) - YouTube
Macbook Pro 13" Retina A1502 Take Apart (2014 Model) - YouTube
MacBook Pro Retina 13 and 15-inch Late 2013 - Mid 2014 SSD upgrade - Flexx memory