How-To: Now's the right time to swap your old iMac's hard drive for a fast new SSD - 9to5Mac
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Amazon.com: De Young 2nd HDD SSD Hard Drive Optical Bay Caddy Frame for iMac 21" 24" 27" Late 2009 2010 2011 2012 2013 2014 SuperDrive + USB 2.0 Cable : Electronics
iMac 21.5” Late 2009 Catalina 8GB RAM 256GB SSD- BEST OFFER for Sale in Katy, TX - OfferUp
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How to Upgrade iMac Hard Drive (2009, 2010, 2011): EveryMac.com
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