Flash-drive speed varies widely, and the Air's stock drive, though zippier than a regular hard drive, isn't the quickest, so it's not optimal for jobs such as pro-level video or photo editing. When I learned that memory manufacturer Other World Computing had begun selling gum-stick-size flash drives, I decided (against Apple's wishes) to replace my stock drive and conduct some performance tests. It turns out that the company's drives are, as promised, very fast. I found that its 240-gigabyte 6G model runs about 35 percent faster than the Air's stock drive [see findings at bottom of post]. There's also a 3G, which is nearly as fast as the 6G and is available in a 480-gigabyte version that dwarfs the Air's 256-gigabyte capacity, allowing me to store my entire music collection.