Android

Browsing Files

• Browse Files in Android (Xamarin)

Accessing Internal and External Storage

• Starting with Android 4.4, reading or writing files in your app's private directories does not require the READ_EXTERNAL_STORAGE or WRITE_EXTERNAL_STORAGE permissions
• Therefor you can declare the permission should be requested only on the lower versions of Android by adding the maxSdkVersion attribute:

<manifest ...>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
                     android:maxSdkVersion="18" />
    ...
</manifest>

• More details around data storage
• Best practices around using Android External Storage
• External environment reference - Details and best practices of how to check the environment, load, and delete files.
• How to list files in an android directory

Solving the DCIM Issue

• Ideas around addressing the device specific camera path issue
• Listing of device specific camera paths

IOS

IOS File System

• How to Enumerate Directories in iOS