How can I turn the short message in my mobile phone into a text file txt?

I can't help it, but try this I thought of it myself!

Download something similar to PC suite, connect the mobile phone directly to the computer (note that it is not a memory card) and then edit the settings in this software.

Note: this thing is not easy to find. It is a rewriting language for domestic machines. Don't think that domestic machines can't brush, but there is no engine oil to crack and develop.