The JetDrive Lite series is specifically designed for MacBook Air and MacBook Pro with Retina display computers. Transcend's JetDrive Lite expansion cards are a quick and easy way to gain the additional space you need without adding any bulk to your MacBook computer. Simply insert JetDrive Lite into the card reader slot on the side of your MacBook and instantly boost your storage capacity. JetDrive Lite cards are built with the highest quality MLC flash and can achieve read speeds of up to 95MB/s and write speeds of up to 60MB/s. Perfect for Time Machine backups,iTunes libraries,or anything inbetween.