Java tutorial
//package com.java2s; import android.annotation.TargetApi; import android.os.Build; import android.os.Environment; public class Main { @TargetApi(Build.VERSION_CODES.GINGERBREAD) public static boolean isExternalStorageRemovable() { return Build.VERSION.SDK_INT < Build.VERSION_CODES.GINGERBREAD || Environment.isExternalStorageRemovable(); } }