Try this from wired.
https://www.wired.com/2017/02/lady-gaga-halftime-show-drones...
2,738 karma · joined February 1, 2015
https://www.wired.com/2017/02/lady-gaga-halftime-show-drones...
"We have a persistent file system, so anything you store within your project is kept. This means you can use files as a flat file database, or save your database files locally (see our SQLite3 and NeDB examples). You can also use third-party storage services, like a hosted MongoDB database or Redis (see our MongoDB example).
We recommend creating a folder called ‘.data’ as a safe place to store your database files. This folder isn’t copied across when a project is remixed."