Ok so i bought a 13 inch Macbook Pro retina 2015 today and i was choosing between the 250gb and 520gb models. We asked two of them if the solid state drive is upgradeable and the guy told me "no, the ssd is soldered on to the logic board and upgrading would snap it", i wanted to get a 256gb model because it doesn't really make sense spending an extra $400 dollars when i'm sure i'd be likely to buy a 1TB ssd in the future. But when my dad heard this, he said well if we can't upgrade we ought to go with the highest memory laptop and we bought it. And i felt bad because all the educated responses in my body told me this guy was lying. And i asked another genius and she also said it was not upgradeable. But it feels like they were trained to say something like that. Now there is a 14 day money back guarantee. It didn't make sense when there's all these videos on youtube showing how people are upgrading their macbook pro ssds. And also if the ssd became corrupted or faulty, it would be highly illogical to have the ssd soldered on.