How to Upgrade iMac Hard Drive (2009, 2010, 2011): EveryMac.com
Amazon.com: OWC SSD Upgrade Kit for 2010 27-inch iMacs, Mercury Electra 1.0TB 6G SSD, 18" SATA III 6Gbps Data Cable, SSD Power Cable, Installation Tools and iMac Screen Adhesive Tape Set :
iMac Mid 2010 SSD Upgrade - YouTube
Replacing HDD with SSD in iMac 2010 | Yktoo
iMac Mid-2010 27 inch (A1312) SSD and RAM disassembly and upgrade - Much FASTER! - YouTube
OWC SSD Upgrade Kits For 21.5-Inch iMac 2010
iMac 27" 21.5" 480GB-1TB SSD Upgrade Service 2010 - 2019 Inc Data Migration | eBay