I was at the Apple Store for over two hours today, while one of the genius' tried to get my MacBook going again. My MacBook stopped working after downloading an update. He tried several times to restore it, it failed every single time. I was told that it looks like the SSD might be at fault and need to be replaced. I put a Samsung EVO SSD in around May of 2014. After some research tonight, I see that there might be a problem with data that gets harder and harder to write to as time goes on. My question is, is it possible to do anything to the SSD from the diagnostic screen, being at I can't fully boot my Mac?