How to upgrade your MacBook Pro with an SSD - CNET
How to Upgrade MacBook Pro Hard Drive (Unibody, 2009-2012): EveryMac.com
Replace your 2009-2012 MacBook Pro HD with an SSD
Install an SSD into the optical superdrive slot on a MacBook Pro | OSXDaily
Installing MacBook Pro 13" Unibody Late 2011 Dual Hard Drive - iFixit Repair Guide
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
MacBook Pro 13" Unibody Mid 2012 Hard Drive Replacement - iFixit Repair Guide
Amazon.com: SZYIKUER 2nd 2.5''HDD SSD Hard Drive Caddy Tray Replacement for MacBook Pro 13/15/17 inch A1278 A1286 A1297 2008 2009 2010 2011 2012 Internal Laptop CD/DVD-ROM Optical SuperDrive Adapter : Electronics
MacBook Pro 15" Unibody Late 2011 Hard Drive Replacement - iFixit Repair Guide
SSD Upgrade Kits for MacBook Air 2010 - 2011
Advice from an Apple Tech: How to replace the optical drive in a Unibody MacBook Pro with a second hard drive | Macworld
MacBook Pro 13" Unibody Mid 2012 Hard Drive Replacement - iFixit Repair Guide
MacBook Pro 15" Unibody Mid 2009 Hard Drive Replacement - iFixit Repair Guide
Replace your 2009-2012 MacBook Pro HD with an SSD
MacBook Pro 13" Unibody Late 2011 Hard Drive Replacement - iFixit Repair Guide
NEW HDD Connector Flex Cable For MacBook Pro A1278 2011 Year 13" laptop SATA Hard Drive HDD SSD Replacement wire 821 1226 A|Computer Cables & Connectors| - AliExpress
Installing MacBook Pro 13" Unibody Early 2011 Dual Hard Drive - iFixit Repair Guide