MacBook Air continues its legacy of firsts with something entirely new for any Mac: flash storage. Standard. In fact, the new MacBook Air is designed completely around flash storage. But in a totally different way. Typically, flash storage is housed in a package that’s the same size as a conventional hard drive. Yet the flash chips themselves occupy a very small portion of that housing. Getting rid of the hard drive enclosure and using only the parts that matter — the actual flash chips — frees up about 90 percent more space. And just like that, there’s room for other important things, like a bigger battery. Now you have a notebook that weighs practically nothing and runs for hours on a single charge. That’s mobility mastered.