By default, the editor dialogs can access folder that are subfolders of the application. In order to access external folders you need to either implement a custom content provider or add the required folder as a virtual directory to the application.
An example of how to implement a custom content provider to the RadEditor's filemanager dialogs is available in this live demo
. A custom content provider that is using physical and shared folder's paths can be found here
All the best,
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items