How to make your MacBook Pro faster – upgrading a MacBook Pro mid-2012 to SSD and more RAM memory - Andy the webdeveloper
Amazon.com: MCE Technologies 2TB Internal SSD Flash Upgrade for MacBook Pro Retina (Mid 2012 - Early 2013) - Includes USB 3.0 Enclosure for Original Drive & Install Kit! : Electronics
Amazon.com: Odyson - 128GB SSD Replacement for Apple MacBook Pro 13" A1425 / 15" A1398 (Late 2012-Early 2013) : Electronics
Macbook Pro Mid 2012 SSD Upgrade - YouTube
How much will an SSD drive improve the performance of my mid 2012 MacBook Pro? - Quora
MacBook Pro Retina (Mid 2012): SSD Replacement - YouTube