I have a 10-year-old MacBook Air. A folder with a question mark appears, which means the system cannot find the startup disk to load the operating system. This often indicates that the operating system (macOS) failed to start or the disk data is corrupted. I have an old MacBook Air (probably about 10 years old). I should have taken photos from it before disposal. The first time it started fine, and I was able to work normally for 30 minutes. Later, I thought I would continue and turned it on again. But the folder with the question mark appeared. What does this mean? Can the data be recovered? Apologies if this topic has already been raised, but maybe you can help or share ideas and suggestions?