MacBook Pro 13" and 15" Retina (Late 2013-Mid 2014) SSD
How to Upgrade the SSD on a MacBook Pro Retina Early/Mid/Late 2013/2014/2015 - Replacement Tutorial - YouTube
SSD upgrade for Mid 2014 MacBook Pro retina 15-inch | PCIe SSD for MacBookPro11,2 Mid 2014 | Flexx Memory
Amazon.com: 256GB SSD Hard Drive for Apple MacBook Pro Air 11" 13" 15" A1502 A1398 A1465 A1466 (Late 2013-2015) / OSX Sierra/Mac Pro A1481 : Electronics
Apple MacBook Pro 15" Mid 2014 i7/16GB/500GB SSD
SSD Upgrades for 2013, 2014, and 2015 MacBook Pro
hardware - MacBook Pro, Mid-2014, SSD replacement - Ask Different
How to Upgrade Retina MacBook Pro SSD Storage: 15-Inch: EveryMac.com