MacBook Pro 13" Unibody Mid 2012 Hard Drive Replacement - iFixit Repair Guide
Mid-2012 Macbook Pro (SSD) Hard Drive Upgrade How To - YouTube
Amazon.com: 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