Amazon.com: AHCI SATA SSD 256GB 3D TLC Flash Hard Drive Replacement for Late 2010 & Mid 2011 MacBook Air A1370 (EMC 2393/2471), A1369 (EMC 2392/2469) : Electronics
MacBook Air 13-Inch (Mid-2011) Teardown Reveals Replaceable SSDs - SlashGear
How to Upgrade MacBook Air Storage (Late 2010/Mid-2011): EveryMac.com