On the iPhone and iPad users can save files externally to the iCloud and possibly other services if those have been set up. This is a good way to get files like the Info file for a chart and use it in an article or reading. Note that iCloud can even be set up on Windows if you want to use the text files there. Note that these text files may not be compatible with NotePad so use WordPad or other text editor on Windows.
It’s really very simple and I’ve made a short video to illustrate the process.