Adding content to 109-storage

src/roadmaps/flutter/content/109-storage/101-shared-preferences.md

@@ -5,3 +5,4 @@ In Flutter, SharedPreferences is a plugin allowing you to store data in key-valu
 Visit the following resources to learn more:
 
 - [shared_preferences - pub.dev package](https://pub.dev/packages/shared_preferences)
+- [How do I access Shared Preferences?](https://docs.flutter.dev/get-started/flutter-for/android-devs#how-do-i-access-shared-preferences)

src/roadmaps/flutter/content/109-storage/index.md

@@ -1 +1,15 @@
 # Storage
+
+Flutter provides several options for persistent storage, some of which are as follow:
+
+- SharedPreferences: A key-value store for small data.
+- SQLite database: A relational database for structured data.
+- File System: For storing large files and data.
+- Firebase: A real-time database and backend as a service.
+
+All of these storage options are supported through third-party packages, which are easily integrated into a Flutter app.
+
+Visit the following links to learn more:
+
+- [Storage - Flutter Tutorial](https://www.youtube.com/watch?v=UpKrhZ0Hppks)
+- [Cloud Storage in Flutter](https://firebase.flutter.dev/docs/storage/overview/)