Transcend's JetDrive Lite storage expansion cards for the MacBook Air and MacBook Pro with Retina display. 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. JetDrive Lite expansion 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, and everything in-between.