Opinion: No SD Card slot? It's the camera companies you should be upset with, not Apple - 9to5Mac
MacBook Pro: How to remove or install memory - Apple Support (CA)
Memory RAM Upgrades for MacBook Pro (2012 - Late 2016)
Transcend 256GB JetDrive Lite 360 Storage Expansion Card for 15-Inch MacBook Pro with Retina Display (TS256GJDL360),Black/silver : Electronics - Amazon.com
BASEQI For Macbook Pro Retina15'' Model Mid 2012 / Early 2013 Aluminum MiniDrive Micro SD Card Adapter Card Reader 503A - AliExpress
SD card slot does not appear - Cursos Apple
Amazon.com: SD Card Reader, ORICO 2-in-1 USB Memory Card Reader for SDXC, SDHC, SD, Micro SD, Micro SDHC Card, and Micro SDXC Cards : Electronics
Apple MacBook Pro (13-inch, Mid 2012) - i5 2.5 GHZ 6GB RAM 120GB SSD | eBay
Use the SD and SDXC card slot on your Mac - Apple Support
Apple MacBook Pro 14" Laptop M3 chip 8GB Memory 10-core GPU 512GB SSD (Latest Model) Space Gray MTL73LL/A - Best Buy
Amazon.com: Transcend 256GB JetDrive Lite 360 Storage Expansion Card for 15-Inch MacBook Pro with Retina Display (TS256GJDL360),Black/silver : Electronics
Kuo: New MacBook Pro Models With HDMI Port and SD Card Reader to Launch Later This Year - MacRumors
Apple Killed Off the Macbook Pro's SD Card Slot Because it's 'Cumbersome' | PetaPixel