What to choose as a storage for an application with tests?

Question

Android

I read one article on Habré about recommendations for using sqlite in android. And it says that sqlite requires a lot of resources, and you need to store less data in it, or use files (xml, json) instead. Also, don't waste your time using foreign keys if you can do without them. consume a lot of resources.
What is really worth choosing?

Answer 1

SQLite will suffice.