A must for all who need more memory on the Mac and are looking for a solution that looks nice and fits in with the design of the MB. Not cheap, but a lot cheaper than a new Macbook, -D I use the Nifty Mini Drive with 128GB Micro SD card for the "outsourcing" of I-Tunes (large music collection). Certainly the speed is due to the performance of SD cards can not be compared with the SSD drive, but perfectly adequate for photos or music.