How-To: Now's the right time to swap your old iMac's hard drive for a fast new SSD - 9to5Mac
Installing a CD/DVD Drive
Amazon.com: DY-tech 2nd Hard Drive HD SSD Caddy Adapter for iMac A1311 A1312 2012 2011 2010 AD-5680H : Electronics
OWC Data Doubler Optical Bay Hard Drive/SSD OWCDIDIMCL0GB B&H
SATA Second HDD SSD Caddy for Apple iMac A1418,iMac A1419,iMac A1224
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OWC Data Doubler Optical Bay Hard Drive/SSD OWCDDMM10CL0GB B&H
WC Data Doubler Optical Bay Hard Drive/SSD Mounting Solution For iMac 2009- 2011. Compatible With 2009-2011 iMac models. Replace your optical Drive With a Hard Drive or SSD! Installation Tools Sold Separately :
OWC Data Doubler Optical Bay Hard Drive/SSD Mounting
How-To: Swap Your iMac, Mac mini or MacBook CD/DVD drive for a super-fast SSD - 9to5Mac
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2nd HDD SSD Caddy SATA3 Second Solid State Hard Drive Enclosure for Apple iMac 2011 2010 2009 A1311 A1312 21.5 27 Inch All-in-One Desktop Computer PC, CD DVD SuperDrive Optical Bay Replacement :