My maxed out Mid-2012 13 inch MBP - 16GB of ram and 1.2TB of SSD! : r/mac
Amazon.com: MCE Technologies 1TB Internal SSD Flash Upgrade for MacBook Pro Retina (Mid 2012 - Early 2013) - Includes USB 3.0 Enclosure for Original Drive & Install Kit! : Electronics
NEW Apple SSD Upgrade 512GB For MacBook Pro Retina 13" 15" 2012 2013 A1425 A1398 | eBay
MacBook Pro (13-inch, Mid 2012) Hard Drive (and possibly RAM) replacement : r/mac
How to Upgrade or Replace MacBook Air SSD (Mid-2012): EveryMac.com
Apple MacBook Pro 13-inch Mid 2012 i7 2.9GHz 8GB RAM 250GB SSD A1278 | eBay
Macbook Pro Retina 13" Mid 2012 - Early 2013 Transcend 480GB - Mac Plus
Sostituzione SSD MacBook Pro Retina 13" fine 2012 - Guida di riparazione iFixit