FeaturesCapacity: 256 GBRead speed: Up to 95 MB/sWrite speed: Up to 55 MB/sCompatible with MacBook Pro (Retina) 15\" (Mid 2012 ~ Early 2013) Built-in Error Correction Code (ECC)Introducing the Transcend JetDrive Lite 350 256 GB Storage Expansion Card. JetDrive Lite expansion cards are a quick and easy way to gain the additional space you need without adding any bulk to your MacBook.Simply insert JetDrive Lite into the card reader slot on the side of your MacBook and instantly boost your storage capacity. With up to 256GB available, you can store up to 124,000 photos, 64,000 songs or 3840 min. of Full HD video.Blazing fastJetDrive Lite expansion cards are built with the highest quality NAND flash and can achieve read speeds of up to 95MB/s and write speeds of up to 55MB/s. Perfect for Time Machine backups, iTunes libraries, and everything in-between.Forget it\'s thereWith a flush profile that\'s tailor-made for each MacBook model, Transcend\'s JetDrive Lite expansion cards are designed to seamlessly integrate with your MacBook. A safety net for your dataDesigned for JetDrive Lite expansion cards, JetDrive Toolbox software offers Recovery and Power Save functions to increase data safety. The Recover function allows you to bring back accidentally deleted image, video, MP3, and PDF files. The Power Save function conserves power by automatically ejecting your JetDrive Lite before the Mac enters Standby mode and remounting it when the Mac wakes up.Count on itJetDrive Lite flash expansion cards are manufactured using advanced COB (chip-on-board) technology, making them resistant to water, dust, and shock. So regardless of what kind of adventures you embark on with your MacBook, you can count on JetDrive Lite expansion cards to keep your data safe.Match it upThe JetDrive Lite series is specifically designed for MacBook Air and MacBook Pro with Retina display computers. The card is available in four different sizes for use in different MacBook models. Find the right size for your MacBook in the comparison chart. Video .iframe-container { overflow: hidden; padding-top: 56.25%; position: relative; } .iframe-container iframe { border: 0; height: 100%; left: 0; position: absolute; top: 0; width: 100%; }