The File Manager widget can work with a file system located on the server. To connect the widget with the file system items, assign the Remote File Provider to the fileProvider option. Pass the endpointUrl to the remote file provider object to specify the Url at which the widget can access the file system items.
Configure the built-in server-side helper methods to process the FileManager widget's AJAX requests on the ASP.NET MVC and ASP.NET Core backend.
This demo contains commented out code lines that enable file modification operations. You can uncomment them and configure if necessary.