MacBook Pro 13 A1502 How to install M2 SSD upgrade - YouTube
SSD Upgrades for 2013, 2014, and 2015 MacBook Pro
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
How To: Replace the SSD in your MacBook Air 13" (Early 2015) - YouTube
MacBook Pro Retina 13 and 15-inch Early 2015 - Mid 2015 SSD upgrade - Flexx memory
How to install an SSD on a 15-inch Retina MacBook Pro