OWC SSD Upgrade Kit For 2010 27-inch iMacs, OWC Mercury Electra 250GB 6G SSD, 18" SATA III 6Gbps data cable, SSD Power Cable, Installation tools and iMac screen adhesive tape set :
Apple iMac Mid 2010 27" Hard Drive + SSD Upgrade Dual Drives - YouTube
How to Upgrade iMac Hard Drive (2009, 2010, 2011): EveryMac.com
OWC SSD Upgrade Kits for 27-Inch iMac 2010
How to Upgrade the Main Drive in a 27-inch iMac (Late 2012 – 2019) - YouTube
How to Upgrade/Replace the Optical Drive in a 27-inch iMac (Mid 2010) iMac11,2 and iMac11,3 - YouTube
iMac Mid-2010 27 inch (A1312) SSD and RAM disassembly and upgrade - Much FASTER! - YouTube
iMac Mid-2010 27 inch (A1312) SSD and RAM disassembly and upgrade - Much FASTER! - YouTube
iMac Mid-2010 27 inch (A1312) SSD and RAM disassembly and upgrade - Much FASTER! - YouTube
OWC SSD Upgrade Kit voor iMac 27" model 2010 (Incl. tools) - onlinemacwinkel
How to Upgrade the Main Drive in a 27-inch iMac Mid 2010 (Updated) - YouTube