diff --git a/Duplicati/Library/Backend/S3/IS3Client.cs b/Duplicati/Library/Backend/S3/IS3Client.cs
index fee68361b..cfd10f2a9 100644
--- a/Duplicati/Library/Backend/S3/IS3Client.cs
+++ b/Duplicati/Library/Backend/S3/IS3Client.cs
@@ -22,13 +22,13 @@ using System;
 using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
-using Duplicati.Library.Interface;
+using Duplicati.Library.Common.IO;
 
 namespace Duplicati.Library.Backend
 {
-    public interface IS3Client : IDisposable
+    internal interface IS3Client : IDisposable
     {
-        IEnumerable<IFileEntry> ListBucket(string bucketName, string prefix);
+        IEnumerable<FileEntry> ListBucket(string bucketName, string prefix);
 
         Task AddBucketAsync(string bucketName, CancellationToken cancelToken);
 
diff --git a/Duplicati/Library/Backend/S3/S3AwsClient.cs b/Duplicati/Library/Backend/S3/S3AwsClient.cs
index e3a480159..3afa4217a 100644
--- a/Duplicati/Library/Backend/S3/S3AwsClient.cs
+++ b/Duplicati/Library/Backend/S3/S3AwsClient.cs
@@ -1,28 +1,28 @@
-// 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 Amazon.S3;
 using Amazon.S3.Model;
-using Duplicati.Library.Backend.Strings;
+using Duplicati.Library.Common.IO;
 using Duplicati.Library.Interface;
 using Duplicati.Library.Utility;
 using System;
@@ -192,7 +192,7 @@ namespace Duplicati.Library.Backend
             return m_client.DeleteObjectAsync(objectDeleteRequest, cancellationToken);
         }
 
-        public virtual IEnumerable<IFileEntry> ListBucket(string bucketName, string prefix)
+        public virtual IEnumerable<FileEntry> ListBucket(string bucketName, string prefix)
         {
             bool isTruncated = true;
             string filename = null;
@@ -239,12 +239,22 @@ namespace Duplicati.Library.Backend
                         obj.Key,
                         obj.Size,
                         obj.LastModified,
-                        obj.LastModified
+                        obj.LastModified,
+                        false,
+                        IsStorageClassArchive(obj.StorageClass)
                     );
                 }
             }
         }
 
+        private bool IsStorageClassArchive(S3StorageClass storageClass)
+        {
+            return storageClass == S3StorageClass.DeepArchive
+                || storageClass == S3StorageClass.Glacier
+                || storageClass == S3StorageClass.GlacierInstantRetrieval
+                || storageClass == S3StorageClass.Snow;
+        }
+
         public async Task RenameFileAsync(string bucketName, string source, string target, CancellationToken cancelToken)
         {
             var copyObjectRequest = new CopyObjectRequest
diff --git a/Duplicati/Library/Backend/S3/S3Backend.cs b/Duplicati/Library/Backend/S3/S3Backend.cs
index 8df4c8355..cffae9bb2 100644
--- a/Duplicati/Library/Backend/S3/S3Backend.cs
+++ b/Duplicati/Library/Backend/S3/S3Backend.cs
@@ -1,27 +1,26 @@
-// 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 Duplicati.Library.Common.IO;
 using Duplicati.Library.Interface;
-using Duplicati.Library.Utility;
 using System;
 using System.Collections.Generic;
 using System.IO;
@@ -272,13 +271,13 @@ namespace Duplicati.Library.Backend
 
         public IEnumerable<IFileEntry> List()
         {
-            foreach (IFileEntry file in Connection.ListBucket(m_bucket, m_prefix))
+            foreach (var file in Connection.ListBucket(m_bucket, m_prefix))
             {
-                ((FileEntry)file).Name = file.Name.Substring(m_prefix.Length);
+                file.Name = file.Name.Substring(m_prefix.Length);
 
                 //Fix for a bug in Duplicati 1.0 beta 3 and earlier, where filenames are incorrectly prefixed with a slash
                 if (file.Name.StartsWith("/", StringComparison.Ordinal) && !m_prefix.StartsWith("/", StringComparison.Ordinal))
-                    ((FileEntry)file).Name = file.Name.Substring(1);
+                    file.Name = file.Name.Substring(1);
 
                 yield return file;
             }
diff --git a/Duplicati/Library/Backend/S3/S3MinioClient.cs b/Duplicati/Library/Backend/S3/S3MinioClient.cs
index 09d2e5d52..317a9e036 100644
--- a/Duplicati/Library/Backend/S3/S3MinioClient.cs
+++ b/Duplicati/Library/Backend/S3/S3MinioClient.cs
@@ -24,6 +24,7 @@ using System.IO;
 using System.Reactive.Linq;
 using System.Threading;
 using System.Threading.Tasks;
+using Duplicati.Library.Common.IO;
 using Duplicati.Library.Interface;
 using Duplicati.Library.Utility;
 using Minio;
@@ -58,7 +59,7 @@ namespace Duplicati.Library.Backend
             m_dnsHost = servername;
         }
 
-        public IEnumerable<IFileEntry> ListBucket(string bucketName, string prefix)
+        public IEnumerable<FileEntry> ListBucket(string bucketName, string prefix)
         {
             ThrowExceptionIfBucketDoesNotExist(bucketName);
 
diff --git a/Duplicati/Library/Backend/SharePoint/SharePointBackend.cs b/Duplicati/Library/Backend/SharePoint/SharePointBackend.cs
index 188826783..388ce0df9 100644
--- a/Duplicati/Library/Backend/SharePoint/SharePointBackend.cs
+++ b/Duplicati/Library/Backend/SharePoint/SharePointBackend.cs
@@ -507,9 +507,9 @@ namespace Duplicati.Library.Backend
             else
             {
                 return remoteFolder.Folders.Where(ff => ff.Exists)
-                    .Select(f => new FileEntry(f.Name, -1, f.TimeLastModified, f.TimeLastModified) { IsFolder = true })
+                    .Select(f => new FileEntry(f.Name, -1, f.TimeLastModified, f.TimeLastModified, true, false))
                     .Concat(remoteFolder.Files.Where(ff => ff.Exists)
-                        .Select(f => new FileEntry(f.Name, f.Length, f.TimeLastModified, f.TimeLastModified) { IsFolder = false }))
+                        .Select(f => new FileEntry(f.Name, f.Length, f.TimeLastModified, f.TimeLastModified, false, false)))
                     .ToArray();
             }
         }
diff --git a/Duplicati/Library/Common/IO/FileEntry.cs b/Duplicati/Library/Common/IO/FileEntry.cs
index fc1b18b49..9811e7b35 100644
--- a/Duplicati/Library/Common/IO/FileEntry.cs
+++ b/Duplicati/Library/Common/IO/FileEntry.cs
@@ -1,23 +1,23 @@
-// 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.
+// 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;
 using Duplicati.Library.Interface;
@@ -29,91 +29,40 @@ namespace Duplicati.Library.Common.IO
     /// </summary>
     public class FileEntry : IFileEntry
     {
-        private string m_name;
-        private DateTime m_lastAccess;
-        private DateTime m_lastModification;
-        private long m_size;
-        private bool m_isFolder;
-
         /// <summary>
         /// Gets or sets the file or folder name
         /// </summary>
-        public string Name
-        {
-            get { return m_name; }
-            set { m_name = value; }
-        }
+        public string Name { get; set; } = null;
 
         /// <summary>
         /// Gets or sets the time the file or folder was last accessed
         /// </summary>
-        public DateTime LastAccess
-        {
-            get { return m_lastAccess; }
-            set { m_lastAccess = value; }
-        }
+        public DateTime LastAccess { get; set; } = new DateTime();
 
         /// <summary>
         /// Gets or sets the time the file or folder was last modified
         /// </summary>
-        public DateTime LastModification
-        {
-            get { return m_lastModification; }
-            set { m_lastModification = value; }
-        }
+        public DateTime LastModification { get; set; } = new DateTime();
 
         /// <summary>
         /// Gets or sets the size of the file or folder
         /// </summary>
-        public long Size
-        {
-            get { return m_size; }
-            set { m_size = value; }
-        }
+        public long Size { get; set; } = -1;
 
         /// <summary>
         /// Gets or sets a value indicating if the entry is a folder
         /// </summary>
-        public bool IsFolder
-        {
-            get { return m_isFolder; }
-            set { m_isFolder = value; }
-        }
+        public bool IsFolder { get; set; } = false;
+
+        /// <summary>
+        /// Gets or sets a value indicating if the entry is archived (not readable)
+        /// </summary>
+        public bool IsArchived { get; set; } = false;
 
         /// <summary>
         /// Helper function to initialize the instance to default values
         /// </summary>
-        private FileEntry()
-        {
-            m_name = null;
-            m_lastAccess = new DateTime();
-            m_lastModification = new DateTime();
-            m_size = -1;
-            m_isFolder = false;
-        }
-
-        /// <summary>
-        /// Constructs an entry using only the name.
-        /// The entry is assumed to be a file.
-        /// </summary>
-        /// <param name="filename">The name of the file</param>
-        public FileEntry(string filename)
-            : this()
-        {
-            m_name = filename;
-        }
-
-        /// <summary>
-        /// Constructs an entry using only the name and size.
-        /// The entry is assumed to be a file.
-        /// </summary>
-        /// <param name="filename">The name of the file</param>
-        /// <param name="size">The size of the file</param>
-        public FileEntry(string filename, long size)
-            : this(filename)
-        {
-            m_size = size;
-        }
+        private FileEntry() { }
 
         /// <summary>
         /// Constructs an entry supplying all information
@@ -122,11 +71,16 @@ namespace Duplicati.Library.Common.IO
         /// <param name="size">The size of the file or folder</param>
         /// <param name="lastAccess">The time the file or folder was last accessed</param>
         /// <param name="lastModified">The time the file or folder was last modified</param>
-        public FileEntry(string filename, long size, DateTime lastAccess, DateTime lastModified)
-            : this(filename, size)
+        /// <param name="isFolder">A value indicating if the entry is a folder</param>
+        /// <param name="isArchived">A value indicating if the entry is archived</param>
+        public FileEntry(string filename, long size = -1, DateTime lastAccess = default, DateTime lastModified = default, bool isFolder = false, bool isArchived = false)
         {
-            m_lastModification = lastModified;
-            m_lastAccess = lastAccess;
+            Name = filename;
+            Size = size;
+            LastAccess = lastAccess;
+            LastModification = lastModified;
+            IsFolder = isFolder;
+            IsArchived = isArchived;
         }
     }
 }