Use this guide to replace a burned-out solid state hard drive.
Use this guide to upgrade or replace the solid-state drive in a MacBook Air 11” Mid 2011. This MacBook Air uses a [https://d3nevzfk7ii3be.cloudfront.net/igi/n4Fo16YKi45Y5JxL.full|proprietary storage drive connector|new_window=true], and is therefore '''not compatible''' with common M.2 drives without the use of an adapter.
'''Before you perform this repair''', if at all possible, [guide|119046|back up your existing SSD|new_window=true]. Then, either familiarize yourself with [guide|119499|internet recovery|new_window=true] or [guide|66371|create a bootable external drive|new_window=true] so you’ll be ready to install macOS onto your new drive and migrate your data to the new SSD.
Finally, we strongly recommend installing macOS 10.13 High Sierra (or a later macOS) before replacing the original SSD from your MacBook Air. Most new SSDs require updated storage drivers not found in versions of macOS prior to High Sierra.