iMac Intel 21.5" EMC 2308 Dual drives. Replace DVD with SSD with fast SATA connector - iFixit Repair Guide
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Amazon.com: HIGHFINE 2nd 2.5'' SATA HDD SSD Hard Drive Disk DVD CD ROM Optical SuperDrive Caddy Tray Adapter for Apple Unibody MacBook/MacBook Pro 13 15 17 Early mid Late 2008 2009 2010 2011 2012.etc : Electronics
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