java.io.FileNotFoundException: /storage/extSdCard/DCIM/DSA/Dummy.xml: open failed: EACCES (Permission denied)

[gandulf]

java.io.FileNotFoundException: /storage/extSdCard/DCIM/DSA/Dummy.xml: open failed: EACCES (Permission denied)
	at libcore.io.IoBridge.open(IoBridge.java:456)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:87)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:72)
	at com.dsatab.fragment.HeroChooserFragment.loadExampleHeroes(HeroChooserFragment.java:304)
	at com.dsatab.fragment.HeroChooserFragment.onOptionsItemSelected(HeroChooserFragment.java:463)
	at android.support.v4.app.Fragment.performOptionsItemSelected(Fragment.java:2309)
	at android.support.v4.app.FragmentManagerImpl.dispatchOptionsItemSelected(FragmentManager.java:2973)
	at android.support.v4.app.FragmentController.dispatchOptionsItemSelected(FragmentController.java:353)
	at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:414)
	at android.support.v7.app.AppCompatActivity.onMenuItemSelected(AppCompatActivity.java:198)
	at android.support.v7.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:113)
	at android.support.v7.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:113)
	at android.support.v7.app.ToolbarActionBar$2.onMenuItemClick(ToolbarActionBar.java:69)
	at android.support.v7.widget.Toolbar$1.onMenuItemClick(Toolbar.java:206)
	at android.support.v7.widget.ActionMenuView$MenuBuilderCallback.onMenuItemSelected(ActionMenuView.java:776)
	at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:822)
	at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:156)
	at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:969)
	at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:959)
	at android.support.v7.widget.ActionMenuView.invokeItem(ActionMenuView.java:623)
	at android.support.v7.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:154)
	at android.view.View.performClick(View.java:5197)
	at android.view.View$PerformClick.run(View.java:20926)
	at android.os.Handler.handleCallback(Handler.java:739)
	at android.os.Handler.dispatchMessage(Handler.java:95)
	at android.os.Looper.loop(Looper.java:145)
	at android.app.ActivityThread.main(ActivityThread.java:5951)
	at java.lang.reflect.Method.invoke(Native Method)
	at java.lang.reflect.Method.invoke(Method.java:372)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
Caused by: android.system.ErrnoException: open failed: EACCES (Permission denied)
	at libcore.io.Posix.open(Native Method)
	at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
	at libcore.io.IoBridge.open(IoBridge.java:442)
	... 30 more