How to properly organize the storage of a large number of records and their receipt?

Question

Database

Tell me a free service in which it will be possible to store, for example, the Book model in which the text Author and Name fields. Their number can be up to 1m.
And if necessary, get these records via GET request. It is also easy to change data through this service.

I just don’t know what to use and how to store data in a simple JSON file or in a SQL database.

Answer 1

https://firebase.google.com