Apple Launches 27" iMac 3TB Hard Drive Replacement Program - MacRumors
OWC SSD Upgrade Kits for 27-Inch iMac 2011
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
How To: Intel iMac Hard Drive Replacement - YouTube
OWC - In-line Digital Thermal Sensor Cable for upgrading the Hard Drive in 27-inch & 21.5-inch iMac (2011) models : Amazon.co.uk: Computers & Accessories
iMac Hard Drive Upgrade to SSD - Your local Apple Repair Specialists
iMac Repair & Upgrade, Same Day Services
How to Upgrade iMac Hard Drive (2009, 2010, 2011): EveryMac.com
21.5" iMac Hard Drive SSD Upgrade or old drive replacement 2012-2017 (Including Retina) in 4k - YouTube
How to Upgrade iMac Hard Drive (2009, 2010, 2011): EveryMac.com
OWC - In-line Digital Thermal Sensor Cable for upgrading the Hard Drive in 27-inch & 21.5-inch iMac (2011) models : Amazon.co.uk: Computers & Accessories