OWC 8GB (2 x 4GB) PC12800 DDR3L 1600MHz SO-DIMMs Memory Compatible with 2011-2015 iMac, 2011-12 Mac Mini, and 2011-2012 MacBook Pro (Non-Retina Display) Models (OWC1600DDR3S08S) at Amazon.com
MacBook Pro (Retina, 13-inch, Early 2015) Upgrade to NVMe M.2 SSD - YouTube
Surprise! iFixit says you can't do much to fix or upgrade the 2015 MacBook | Ars Technica
A-Tech 16GB Kit (2x8GB) 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
How to increase RAM on MacBook Pro - Quora
Giving Macbook Air (Early 2015) a new life! Upgrade to Monterey + 512GB SSD : r/macbook
Apple Macbook Pro 13 (2015) Laptop | i5 + 8GB RAM + 128GB SSD | MacOS Monterey | eBay