Apple MacBook Pro 15.4" Retina intel® Quad-Core i7 2.2GHz Mid 2014 (Ricondizionato) - FlashMac
Is it possible to upgrade MacBook Pro (Retina, 15-inch, Mid 2014) to 32GB RAM? - Quora
A-Tech 8GB RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
Easiest Step by Step How-To Guide to Upgrading your Macbook Pro 13" Retina Mid 2014 SSD - YouTube