Best way to upload data in server for android studio project .. Like pdf, picture, information?

Question

How to store all data (like pdf file, picture, user name and password..etc..)in server to use app. Actually I'm making android studio project but don't know how to add all data online.
And how to make url for that to use in app

Answer 1

use database it is the best way to store data
Database : SQL - SQLite, Android room
: NoSQL - Firebase, PaperDB, MongoDB..