Fine Tuned Tech - Why did Apple ship their premium 21.5 inch iMac with a slow laptop hard drive from 2012-2019? If you have one of these models, it can be upgraded
How to Install/Upgrade the SSD Card Slot of a 27-inch iMac (Late 2012) on Vimeo
How to Install an SSD Card into a 21.5-inch iMac (Late 2012–Early 2013) on Vimeo
128 GB SSD for iMac 27 2012 A1419 DIY Parts replacement Hard Drives
mSATA to 17+7pin SSD for 2012 Retina iMac A1425 A1398 MC975 MC976 Conv – RIITOP
128GB SSD Samsung MZ-DPC128T/OA2 FOR APPLE iMac 2012-2013 655-1793 - Part Haven
You won't be adding an aftermarket SSD to your new iMac | Ars Technica
iMac 2012 internal storage upgrade
SATA Blade SSD Module - Dual SSD Drive Kit for iMac 27 Inch 2012 Model - Walmart.com
SATA Blade SSD Module - Dual SSD Drive Kit for iMac 27"
Apple iMac 27" A1419 Late 2012 Intel i5 3.2GHz Logic Board 820-3299-A – Dealm4kers