2013 MacBook Air NGFF PCIe SSD Review (256GB) - Pre-Configured MBA Doesn't Set The 'PC' Performance Bar | The SSD Review
661-7459 Apple 256GB SSD (Solid State Drive) for MacBook Air 11" & 13" Mid 2013 Early 2014
2013 MacBook Air: PCIe SSD and Haswell ULT Inside
Amazon.com: 256GB SSD Hard Drive for Apple MacBook Pro Air 11" 13" 15" A1502 A1398 A1465 A1466 (Late 2013-2015) / OSX Sierra/Mac Pro A1481 : Electronics
How to Upgrade the PCIe SSD in an 11-inch MacBook Air (Mid 2013 – Early 2015) - YouTube