Got the 128G one at Xmas for my 256G MBA (about 1/2 of that was dedicated for bootcamp, so space was getting snug). Currently have 56G worth of files on the card: 26G of school material including 10 Coursera classes fully archived with videos. The videos play decent too, was not expecting that. 18G of Ebooks, lots of technical books but digital comics taking up most of that 7G for Itunes (not a big iTunes guy) Haven't tried any VM entries yet, but would probably crawl. So much fun though, a cheap 50% increase in storage without gaining size. Such a great time in history to be a nerd.