root dir management is fully functional.

NzbDrone.Api/QualityProfiles/RootFolderModule.cs

@@ -16,17 +16,24 @@ namespace NzbDrone.Api.QualityProfiles
 
             Get["/"] = x => GetRootFolders();
             Post["/"] = x => AddRootFolder();
+            Delete["/{id}"] = x => DeleteRootFolder((int)x.id);
         }
 
         private Response AddRootFolder()
         {
-            _rootDirProvider.Add(Request.Body.FromJson<RootDir>());
-            return new Response { StatusCode = HttpStatusCode.Created };
+            var dir = _rootDirProvider.Add(Request.Body.FromJson<RootDir>());
+            return dir.AsResponse(HttpStatusCode.Created);
         }
 
         private Response GetRootFolders()
         {
             return _rootDirProvider.AllWithFreeSpace().AsResponse();
         }
+
+        private Response DeleteRootFolder(int folderId)
+        {
+            _rootDirProvider.Remove(folderId);
+            return new Response { StatusCode = HttpStatusCode.OK };
+        }
     }
 }

NzbDrone.Core/Providers/RootDirProvider.cs

@@ -29,7 +29,7 @@ namespace NzbDrone.Core.Providers
             return _database.Fetch<RootDir>();
         }
 
-        public virtual void Add(RootDir rootDir)
+        public virtual RootDir Add(RootDir rootDir)
         {
             if (String.IsNullOrWhiteSpace(rootDir.Path) || !Path.IsPathRooted(rootDir.Path))
                 throw new ArgumentException("Invalid path");
@@ -40,7 +40,11 @@ namespace NzbDrone.Core.Providers
             if (GetAll().Exists(r => DiskProvider.PathEquals(r.Path, rootDir.Path)))
                 throw new InvalidOperationException("Root directory already exist.");
 
-            _database.Insert(rootDir);
+            var id = _database.Insert(rootDir);
+            rootDir.Id = Convert.ToInt32(id);
+            rootDir.FreeSpace = _diskProvider.FreeDiskSpace(new DirectoryInfo(rootDir.Path));
+
+            return rootDir;
         }
 
         public virtual void Remove(int rootDirId)
@@ -96,13 +100,13 @@ namespace NzbDrone.Core.Providers
             {
                 var pathRoot = _diskProvider.GetPathRoot(rootDir.Path);
 
-                if(!freeSpace.ContainsKey(pathRoot))
+                if (!freeSpace.ContainsKey(pathRoot))
                 {
                     try
                     {
                         freeSpace.Add(pathRoot, _diskProvider.FreeDiskSpace(new DirectoryInfo(rootDir.Path)));
                     }
-                    catch(Exception ex)
+                    catch (Exception ex)
                     {
                         Logger.WarnException("Error getting fromm space for: " + pathRoot, ex);
                     }

NzbDrone.Web/Web.config

@@ -80,7 +80,7 @@
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.0.8.0" newVersion="4.0.8.0" />
+        <bindingRedirect oldVersion="0.0.0.0-4.5.0.0" newVersion="4.5.0.0" />
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="dotless.ClientOnly" publicKeyToken="96b446c9e63eae34" culture="neutral" />

NzbDrone.Web/_backboneApp/AddSeries/RootDir/RootDirModel.js

@@ -1,4 +1,4 @@
 /// <reference path="../../app.js" />
 NzbDrone.AddSeries.RootDirModel = Backbone.Model.extend({
-    url: NzbDrone.Constants.ApiRoot + 'rootdir/',
+    idAttribute: 'Id',
 });

NzbDrone.Web/_backboneApp/AddSeries/RootDir/RootDirView.js

@@ -17,6 +17,7 @@ NzbDrone.AddSeries.RootDirItemView = Backbone.Marionette.ItemView.extend({
 
     removeDir: function () {
         this.model.destroy({ wait: true });
+        this.model.collection.remove(this.model);
     },
 
 });
@@ -74,7 +75,7 @@ NzbDrone.AddSeries.RootDirView = Backbone.Marionette.Layout.extend({
         });
 
         this.collection.create(newDir, { wait: true });
-        this.fetch();
+        this.collection.fetch();
     },
 
     search: function (context) {