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Keeping your code clean and tested are the two most important development practices. In Flutter, this is even more true than with other frameworks. On one hand, it's nice to hack a quick app together, on the other hand, larger projects start falling apart when you mix the business logic everywhere. Even state management patterns like BLoC are not sufficient in themselves to allow for easily extendable codebase.

This is where we can employ clean architecture and test driven development. As proposed by our friendly Uncle Bob, we should all strive to separate code into independent layers and depend on abstractions instead of concrete implementations.

In this example, we are going to show you the easiest way to get internal and external storage path in Flutter app. You will learn to get root path, app file directory, available free space in GB at both internal and external SD card storage in Flutter App.

Using StateNotifier also works perfectly. Well, until recently.. then I found out that updating a setting value not only updates the UI that listens to that value, but also updates other parts of the UI that don't listen to it, but listen to other setting values in the same state. I hope you get what I mean from the last sentence.

To make it clear, let me show you a very simple demonstration.

We'll make 2 switches: Switch A and Switch B.
Switch A will build Box A, and should not build Box B.
Switch B will build Box B, and should not build Box A.

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