Can I upgrade the SSD on the Early 2015 13" Macbook Pro?
Solution 1:
Answer in 2020: A MacRumors forum post details the process of using an adapter along with a general M.2 NVMe SSD drive to replace the OEM drive in certain Macbook models, and 2015 13'' Macbook Pro is one of them. The post argues that this method is much better than using OWC/Transcend drives due to price and quality. I have personally followed the guide and completed the replacement, and 3 months in everything works fine.
Solution 2:
Have a look here at MCE USA. They offer SSD Blades for MacBook Pro Late 2013 - Early 2015 from 256GB up to 1TB. http://store.mcetech.com/mm/merchant.mvc?Store_Code=MTOS&Screen=CTGY&Category_Code=PCIEFLASH
OWC/MacSales doesn't have any yet.
Solution 3:
It seems like OWC has finally managed to build replacement SSDs for the new macbook pro retina models, including the 13" early 2015 model (480 gb model): http://www.owcshop.eu/catalog/product_info.php/aura-macbook-retina-mid2013-till-2015-480gb-preord-p-1380#.Vup7ExIrK-Y
And a 1 TB model too: http://www.owcshop.eu/catalog/product_info.php/aura-macbook-retina-mid2013-till-2015-preorder-p-1378#.Vup7OhIrK-Y