SQLite Forum

General question concerning database stucture and number of databases to use.
I apologize for asking another rather novice question. 

I'm attempting to move an indexedDB web extension database structure to a native C application compiled with SQLite3. In the extension, users build portfolios of study modules.  In indexedDB, each portfolio was a separate database of four object stores because it was supposed to be a poor set up to perform a database version change each time a user added a new portfolio requiring another set of object stores.  Data for all modules within a portfolio was stored in each of the four object stores using a three element array as a primary key.

In SQLite3, it appears that adding new tables is rather simple. So, my question is what should be considered in determining whether to create a separate database for each portfolio or one database for all possible portfolios, and whether to create a set of four tables for each module or include all modules in one set of four tables?

I'd appreciate any guidance you could provide. Below are some characteristics of the database needs of this extension tool.  I'm assuming it is a rather simple little tool from the perspective of its database needs at least.

Thank you for you assistance.

1. All the portfolios a user could ever build, plus any media files they choose to include, would never exceed a small fraction of the maximum SQLite3 database size.

2. Users could choose to open multiple portfolios with multiple modules open within each portfolio, either in separate browser tabs or within the same tab. Only one user can ever have a database open because it all runs on the local machine like a desktop application.

3. There will be frequent database write requests (to capture the current state), almost all of which will involve very small amounts of data in a single row of each of two tables, or the readonly selection of ten to thirty rows from each of two tables in a single request. The only potential for operations involving larger amounts of data is when users store images, PDFs, audio, and/or video files to include in their modules and request the data to display a small number of them at any one time.

4. Lastly, I'd like it to be easy for users to share the portfolios they've built with others, and to incorprate those portfolios into the user's database or set of databases.