A Taiwanese firm Photofast has developed a compelling upgrade for the new "MacBook Air," a 256GB SSD memory module which doubles the maximum capacity of the machines. MacBook Air uses an SSD (flash memory) card instead of a hard drive. Photofast plans to offer 64GB / 128GB / 256GB SSD aftermarket upgrades.
Photofast says its upgrade is fast and stable, but promises speeds of 250MB/s for sequential reads and writes. Typically conservative in its promises, Apple promises just 150-160MB/s speeds. Overall, Photofast promises a 30 percent performance boost.
Photofast also offers kit to let you convert your existing MacBook Air SSD into a USB storage device. Pricing hasn't yet been announced.