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It’s a series MZ-75E2T0B/AM. If not, what should I use? Trying to get the largest capacity possible without sacrificing speed. I’m a novice, so go easy on me!

Hi, It does not seem you can upgrade the SSD of your MBP with the SSD you mentioned. You should look for specific SSD compatible with your MBP. The following link indicates what model of SSD to buy and how to upgrade it on your MBP. It’s an easy process! Hope that helps :) MacBook Pro 15" Retina Display Mid 2012 SSD Replacement

Your only choice for the SSD is OWC - MacBook Pro with Retina 13" & 15" 2012 — Early 2013. Sadly, Apple uses a custom SSD design, other than them, OWC is it!

@mcdaddy1, this is what I did with my mid 2012 13" Retina.

  1. I got this adapter from ebay http://www.ebay.com/itm/272335219747
  2. then I got a 1tb Samsung EVO mSata
  3. After installing OS X 10.10.5 or newer I ran the following command ‘sudo trimforce enable’ This works perfectly.