MacBook Pro 13" Retina SSD Upgrade

Sorry Nur your just a little early here for upgrades for this system. You see Apple changed the SSD from a SATA III (6Gp/s) to a PCIe 2.0 device which currently is not available from 3rd parties and Apple does not offer any upgrade options at this time.

The standards group is in the process of creating a blade standard called M.2. Here's a write up when they started the process PCIe for Mobile Launched; PCIe 3.1, 4.0 Specs Revealed. Nothing is expected to be available until mid '14. That is still assuming the Apple SSD interface complies with the M.2 standard everyone else decides to make. Even still there is enough of a market for someone to create a compliant offering but that will likely take a bit more time.

Again, things are in flux here so hang tight ;-}