I just shipped my first Forms app to the Apple and Google app stores. It uses a few components that I downloaded from the Xamarin component store using the functionality in the IDE. I just got a query from someone about why the Android version of the app needs the external storage permission. I was a bit confused since the only permissions I had in the manifest were related to network and internet. But I found that inside the /components/ directory in my app's project there are samples directories in each of the components there. One had a manifest requesting the external storage permission.