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 ### Android
 
-* [Advanced Android App Development](https://www.udacity.com/course/advanced-android-app-development--ud855) (Udacity)
 * [Android App Development for Beginners Playlist](https://www.youtube.com/playlist?list=PL6gx4Cwl9DGBsvRxJJOzG4r4k_zLKrnxl) - Bucky Roberts (thenewboston)
 * [Android App Development Tutorial for Beginners (2020) \| Complete Guides and Courses](https://www.youtube.com/playlist?list=PLwhVruPHD9rz2MwQuYSenQ0WK1IGP5rYM) - tutorialsEU
-* [Android Basics: Data Storage](https://www.udacity.com/course/android-basics-data-storage--ud845) (Udacity)
-* [Android Basics: Multiscreen Apps](https://www.udacity.com/course/android-basics-multiscreen-apps--ud839) (Udacity)
-* [Android Basics: Networking](https://www.udacity.com/course/android-basics-networking--ud843) (Udacity)
-* [Android Basics: User Input](https://www.udacity.com/course/android-basics-user-input--ud836) (Udacity)
-* [Android Basics: User Interface](https://www.udacity.com/course/android-basics-user-interface--ud834) (Udacity)
 * [Android Basics with Compose](https://developer.android.com/courses/android-basics-compose/course) - Google Developers Training
 * [Android Developer Fundamentals (Version 2) — Codelab](https://developer.android.com/courses/fundamentals-training/toc-v2)
 * [Android Developer Fundamentals (Version 2) — Concepts](https://google-developer-training.github.io/android-developer-fundamentals-course-concepts-v2/index.html)
@@ -239,7 +233,6 @@
 * [Learn Android Application Development for Beginners](https://www.udemy.com/course/learn-android-application-development-y/) - Johan Jurrius, ProgramMe Programming (Udemy)
 * [Learn Android in 9 Hours](https://www.youtube.com/watch?v=aS__9RbCyHg) (Edureka)
 * [Material design](https://material.io/guidelines/)
-* [Material Design for Android Developers](https://www.udacity.com/course/material-design-for-android-developers--ud862) (Udacity)
 * [MVVM Image Search App with Architecture Components & Retrofit](https://www.youtube.com/playlist?list=PLrnPJCHvNZuC_pEfFlZuTmjlY4T3DTtED) - Florian Walther ( Coding in flow )
 * [MVVM NewsApp, Retrofit, Room, Coroutines, Navigation Components](https://www.youtube.com/playlist?list=PLQkwcJG4YTCRF8XiCRESq1IFFW8COlxYJ) - Philipp Lackner
 * [MVVM Spotify Clone](https://www.youtube.com/playlist?list=PLQkwcJG4YTCT-lTlkOmE-PpRkuyNXq6sW) - Philipp Lackner