Upgrading a 2015 MacBook Pro Retina with the 2TB OWC Aura Pro X2 SSD upgrade kit
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
MacBook Air 11" Early 2015 SSD Replacement - iFixit Repair Guide
Apple 2TB PCIe SSD Flash Storage - 2013-2015 Retina MacBook Pro A1398 A1502 | eBay
Amazon.com: 128GB SSD Hard Drive Apple MacBook Pro 13" A1502 / Mac 15" A1398 / Mac Air 11" / 13" A1465 A1466 OSX Sierra/Late 2013 - Mid 2015 / Mac Pro A1481 : Electronics
How to Upgrade the SSD on a MacBook Pro Retina Early/Mid/Late 2013/2014/2015 - Replacement Tutorial - YouTube