diff --git a/Duplicati/Library/Interface/ICommonModule.cs b/Duplicati/Library/Interface/ICommonModule.cs
new file mode 100644
index 000000000..ffecfe172
--- /dev/null
+++ b/Duplicati/Library/Interface/ICommonModule.cs
@@ -0,0 +1,17 @@
+namespace Duplicati.Library.Interface;
+
+public interface ICommonModule : IDynamicModule
+{
+    /// <summary>
+    /// Gets the module key
+    /// </summary>
+    string Key { get; }
+    /// <summary>
+    /// Gets the display name of the module
+    /// </summary>
+    string DisplayName { get; }
+    /// <summary>
+    /// Gets the description of the module
+    /// </summary>
+    string Description { get; }
+}
diff --git a/Duplicati/Library/Interface/IFolderEnabledBackend.cs b/Duplicati/Library/Interface/IFolderEnabledBackend.cs
index 6f9374aed..2774a388c 100644
--- a/Duplicati/Library/Interface/IFolderEnabledBackend.cs
+++ b/Duplicati/Library/Interface/IFolderEnabledBackend.cs
@@ -28,9 +28,8 @@ using System.Threading.Tasks;
 namespace Duplicati.Library.Interface;
 
 /// <summary>
-/// An interface a backend may implement if it supports streaming operations.
-/// Backends that implement this interface can be throttled and correctly shows 
-/// the progressbar when transferring data.
+/// An interface for backends that support folder operations.
+/// Backends that implement this interface can be used as sources for data.
 /// </summary>
 public interface IFolderEnabledBackend : IBackend
 {
diff --git a/Duplicati/Library/Interface/IGenericModule.cs b/Duplicati/Library/Interface/IGenericModule.cs
index f18e463cd..d6e3fe308 100644
--- a/Duplicati/Library/Interface/IGenericModule.cs
+++ b/Duplicati/Library/Interface/IGenericModule.cs
@@ -1,22 +1,22 @@
-// Copyright (C) 2025, The Duplicati Team
-// https://duplicati.com, hello@duplicati.com
-// 
-// Permission is hereby granted, free of charge, to any person obtaining a 
-// copy of this software and associated documentation files (the "Software"), 
-// to deal in the Software without restriction, including without limitation 
-// the rights to use, copy, modify, merge, publish, distribute, sublicense, 
-// and/or sell copies of the Software, and to permit persons to whom the 
-// Software is furnished to do so, subject to the following conditions:
-// 
-// The above copyright notice and this permission notice shall be included in 
-// all copies or substantial portions of the Software.
-// 
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
-// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+// Copyright (C) 2025, The Duplicati Team
+// https://duplicati.com, hello@duplicati.com
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a 
+// copy of this software and associated documentation files (the "Software"), 
+// to deal in the Software without restriction, including without limitation 
+// the rights to use, copy, modify, merge, publish, distribute, sublicense, 
+// and/or sell copies of the Software, and to permit persons to whom the 
+// Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in 
+// all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 // DEALINGS IN THE SOFTWARE.
 
 using System.Collections.Generic;
@@ -34,23 +34,8 @@ namespace Duplicati.Library.Interface
     /// All instances where the Configure method is called will be disposed,
     /// if they implement the IDisposable interface as well.
     /// </summary>
-    public interface IGenericModule : IDynamicModule
+    public interface IGenericModule : ICommonModule
     {
-        /// <summary>
-        /// The module key, used to activate or deactivate the module on the commandline
-        /// </summary>
-        string Key { get; }
-
-        /// <summary>
-        /// A localized string describing the module with a friendly name
-        /// </summary>
-        string DisplayName { get; }
-
-        /// <summary>
-        /// A localized description of the module
-        /// </summary>
-        string Description { get; }
-
         /// <summary>
         /// A boolean value that indicates if the module should always be loaded.
         /// If true, the  user can choose to not load the module by entering the appropriate commandline option.
diff --git a/Duplicati/Library/Interface/ISecretProvider.cs b/Duplicati/Library/Interface/ISecretProvider.cs
index 2aa5e3d78..2595f1db1 100644
--- a/Duplicati/Library/Interface/ISecretProvider.cs
+++ b/Duplicati/Library/Interface/ISecretProvider.cs
@@ -29,7 +29,7 @@ namespace Duplicati.Library.Interface;
 /// <summary>
 /// Interface for secret providers
 /// </summary>
-public interface ISecretProvider : IDynamicModule
+public interface ISecretProvider : ICommonModule
 {
     // abstract static Task<T> CreateAsync<T>(string config, CancellationToken cancellationToken)
     //     where T : ISecretProvider;
@@ -57,10 +57,6 @@ public interface ISecretProvider : IDynamicModule
     /// <param name="cancellationToken">The cancellation token.</param>
     Task SetSecretAsync(string key, string value, bool overwrite, CancellationToken cancellationToken);
     /// <summary>
-    /// The key for the secret provider
-    /// </summary>
-    string Key { get; }
-    /// <summary>
     /// Indicates whether the secret provider is supported on the current platform.
     /// </summary>
     /// <param name="cancellationToken">The cancellation token.</param>
@@ -69,12 +65,4 @@ public interface ISecretProvider : IDynamicModule
     /// Indicates whether the secret provider supports setting secrets.
     /// </summary>
     bool IsSetSupported { get; }
-    /// <summary>
-    /// The display name of the secret provider
-    /// </summary>
-    string DisplayName { get; }
-    /// <summary>
-    /// The description of the secret provider
-    /// </summary>
-    string Description { get; }
 }
diff --git a/Duplicati/Library/Interface/ISnapshotService.cs b/Duplicati/Library/Interface/ISnapshotService.cs
index 9149615b2..3cf79fc8b 100644
--- a/Duplicati/Library/Interface/ISnapshotService.cs
+++ b/Duplicati/Library/Interface/ISnapshotService.cs
@@ -114,7 +114,7 @@ public interface ISnapshotService : IDisposable
     /// <returns>The metadata for the given file or folder</returns>
     /// <param name="localPath">The file or folder to examine</param>
     /// <param name="isSymlink">A flag indicating if the target is a symlink</param>
-    Dictionary<string, string> GetMetadata(string localPath, bool isSymlink);
+    Dictionary<string, string?> GetMetadata(string localPath, bool isSymlink);
 
     /// <summary>
     /// Gets a value indicating if the path points to a block device
diff --git a/Duplicati/Library/Interface/ISourceProviderModule.cs b/Duplicati/Library/Interface/ISourceProviderModule.cs
index 469db1fb0..d9c5dc297 100644
--- a/Duplicati/Library/Interface/ISourceProviderModule.cs
+++ b/Duplicati/Library/Interface/ISourceProviderModule.cs
@@ -26,14 +26,6 @@ namespace Duplicati.Library.Interface;
 /// <summary>
 /// Implements a data source that can be backed up
 /// </summary>
-public interface ISourceProviderModule : ISourceProvider, IDynamicModule
+public interface ISourceProviderModule : ISourceProvider, ICommonModule
 {
-    /// <summary>
-    /// Gets the module key
-    /// </summary>
-    string Key { get; }
-    /// <summary>
-    /// Gets the display name of the module
-    /// </summary>
-    string DisplayName { get; }
 }