Where do mobile apps store their data?

Question

Android

Here I am new to android development and I'm wondering where applications store their data. For example, if I want to create my application as a library from different books, let's say there are 100 or more books. Where should I put these books? And where will the user download them from?? I mean how do I embed these books in the application?

Answer 1

android/obb or android/data

Answer 2

For such applications, a web server is provided. It can be either a full-fledged web server with an admin panel or a cloud storage where the necessary materials are simply thrown