Save to on device storage help?

My app is getting a bit more complex and I now need to save a set of variables to on device storage. I am looking for a simple example of how to do this. Can someone help?

Thanks!

Hello,
Maybe start with the doc :

Thanks. I have watched several times. I am missing something. In dbase, you have files, fields, records. Maybe the appgyver lingo is throwing me off.