DIY Bundle - 2TB OWC 6G SSD and HDD Kit for 27-Inch iMac
Apple iMac 21.5” SSD Upgrade (2013-2015) HDD To Solid State Drive (SATA) | Step By Step - YouTube
2011 imac 27" 32GB - final stage of 1TB + 2TB SSD upgrade (replaced HDD & optic drive). Also cleaned out the fans and case. Running 'SSD Fan Control' & 'Macs Fan
SOLVED: Can I attach m.2 ssd heatsink to the 2019 iMac 27inch? - iMac Intel 27" Retina 5K Display 2019 - iFixit
How-To: Now's the right time to swap your old iMac's hard drive for a fast new SSD - 9to5Mac