How to install an SSD on a 15-inch Retina MacBook Pro
Apple: MacBook Pro 15'' Retina Mid-2015: Upgrade RAM to 32Gb - YouTube
MacBook Pro 13" Retina Display Late 2013 Teardown - iFixit
How to install an SSD on a 15-inch Retina MacBook Pro
SSD Upgrades for 2013, 2014, and 2015 MacBook Pro
MacBook Pro Retina 13 and 15-inch Early 2015 - Mid 2015 SSD upgrade - Flexx memory
Amazon.com: Apple MacBook Pro 15in Core i7 2.8GHz Retina (MGXG2LL/A), 16GB RAM, 512GB Solid State Drive (Renewed) : Electronics
Amazon.com: UESWILL Matte Hard Case Compatible with MacBook Pro (Retina, 15 inch, Mid 2012/2013/2014/Mid 2015), Model A1398, NO CD-ROM, NO Touch Bar, Navy Blue : Electronics
Amazon.com: Apple 15.4in MacBook Pro Laptop Computer with Retina Display MGXC2LL/A - Intel Core i7 2.5GHz, 16GB RAM, 256GB SSD (Renewed) : Electronics