The JetDrive Lite 350 is an expansion card designed specifically for Macbook Pro Retina 15 inch (mid 2012 - early 2013). With its design, the card adapts perfectly to the shape of your MacBook. It provides extra storage space and is small enough not to add weight to your MacBook. The JetDrive Lite expansion card is designed to fit your style. Once you insert the card, you'll hardly notice it's there. It doesn't protrude out of the card reader slot, so it can stay in place when you're on the go. The JetDrive Lite expansion card offers plenty of storage space to store personal documents, photos, movies and music or to take them with you when you're on the go. Insert the card into the side card reader slot on your MacBook and instantly increase your storage capacity. The JetDrive Lite expansion card achieves lightning-fast read/write rates of up to 95MB/sec or 60MB/sec under USB 3.0. The JetDrive Lite expansion card is water, dust and shock resistant. So no matter where your MacBook travels, you can rest assured that the card is a safe place for all your data.