I have a rescued mid-2013 11 inch MacBook Air working great off external USB 3 hard drive but missing its internal SSD.
They use a custom SSD, which seem to be expensive even used and aftermarket.
Are any adaptors available to install a generic SSD?
I Googled and thought I found that they do now exist, but then I realized the ones I found were the opposite, for using the SSDs from various MacBooks in other laptops etc.