How to Upgrade Retina MacBook Pro SSD Storage: 13-Inch: EveryMac.com
Amazon.com: Odyson - 128GB SSD Replacement for MacBook Pro 13" Retina A1502, 15" A1398 (Late 2013, Mid 2014) : Electronics
Amazon.com: JESOT NGFF M.2 NVMe SSD Convert Adapter Card for Upgrade MacBook Air 2013 2014 2015 2016 2017 and Mac Pro Retina 2013 2014 2015, NVMe AHCI SSD Upgraded Kit for A1465 A1466 A1398 A1502 : Electronics
MacBook Pro 13" and 15" Retina (Late 2013-Mid 2014) SSD
Amazon.com: OWC 1.0TB Aura Pro NT High-Performance NVMe SSD Upgrade Kit with Tools, Compatible with 2016-2017 13-inch MacBook Pro Non-Touch Bar : Electronics
MacBook Pro (Retina, 13-inch, Mid 2014) - Technical Specifications
MacBook Pro 13" Retina 512GB Blade SSD Solid State Drive, Late 2013 / Mid 2014 - 661-8139