iMac Intel 20" EMC 2133 and 2210 Hard Drive Replacement - iFixit Repair Guide
How to replace hard drive in iMac 2011 - YouTube
OWC DIY Drive Upgrade/Install Kits for Apple iMac Models
iFixit Offers Kit To Install 2nd Hard Drive in Mid-2011 iMacs - MacRumors
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
OWCDIYIMACHDD12, OWC Complete Hard Drive Upgrade Kit Including Tools for all 27" iMacs 2012 & Later | EET
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