(A friend of mine asked me the other day why I could normally read and write files on the IOS platform, but not on the Android platform. At that time, because I was at work, I didn't have time to help him manage. When I got home at night, I picked up my Android phone and debugged it. I quickly located the problem. It was his way of writing the file that was wrong. When solving a difficult problem in development, I find that it is really simple. It happens that the MOMO book also involves file reading and injection. In this section, I will move some of the contents of the book to the blog for you to explain. I won't talk much nonsense. Let's go straight to the topic, create a Text.cs script, and hang it directly in the camera. The code includes creating files, reading files, and deleting files.)