MacBook Pro Retina (Mid 2012): SSD Replacement - YouTube
Replace your 2009-2012 MacBook Pro HD with an SSD
Is upgrading the mid-2012 MacBook Pro Worth It? - Learn Robotics
Amazon.com: GODSHARK mSATA to A1398 A1425 (2012 & Early 2013) Adapter for MacBook Pro Retina SSD Replacement, Mini PCIe SATA SSD Converter Card : Electronics