diff --git a/PatchSync.SDK/Client/IDownloadProgress.cs b/PatchSync.SDK/Client/IDownloadProgress.cs
new file mode 100644
index 0000000..47d94ed
--- /dev/null
+++ b/PatchSync.SDK/Client/IDownloadProgress.cs
@@ -0,0 +1,8 @@
+namespace PatchSync.SDK.Client;
+
+public interface IDownloadProgress
+{
+    public long TotalSize { get; }
+    public long TotalDownloaded { get; }
+    public double Speed { get; }
+}
diff --git a/PatchSync.SDK/Client/PatchSyncClient.cs b/PatchSync.SDK/Client/PatchSyncClient.cs
index 8f25f8c..5549b28 100644
--- a/PatchSync.SDK/Client/PatchSyncClient.cs
+++ b/PatchSync.SDK/Client/PatchSyncClient.cs
@@ -49,7 +49,11 @@ public async Task<SignatureFile> GetSignatureFile(int originalFileSize, string r
         return signatureFile;
     }
 
-    public async IAsyncEnumerable<Stream> DownloadDeltaPatchFileAsync(string relativeUri, IEnumerable<(int Start ,int End)> ranges, IProgress<(double Progress, double Speed)> progress = null)
+    public async IAsyncEnumerable<Stream> DownloadDeltaPatchFileAsync(
+        string relativeUri,
+        IEnumerable<(long Start, long End)> ranges,
+        IProgress<IDownloadProgress> progress = null
+    )
     {
         long totalSize = 0;
         using var httpClient = HttpHandler.CreateHttpClient();
@@ -65,7 +69,7 @@ public async IAsyncEnumerable<Stream> DownloadDeltaPatchFileAsync(string relativ
         httpClient.DefaultRequestHeaders.Range = new System.Net.Http.Headers.RangeHeaderValue();
         foreach (var range in ranges)
         {
-            totalSize += range.End - range.Start + 1;;
+            totalSize += range.End - range.Start + 1;
             httpClient.DefaultRequestHeaders.Range.Ranges.Add(
                 new System.Net.Http.Headers.RangeItemHeaderValue(range.Start, range.End)
             );
@@ -76,7 +80,10 @@ public async IAsyncEnumerable<Stream> DownloadDeltaPatchFileAsync(string relativ
         // Throw if not successful
         response.EnsureSuccessStatusCode();
 
-        var progressInfo = new ProgressInfo();
+        var progressInfo = new ProgressInfo
+        {
+            TotalSize = totalSize
+        };
 
         if (response.Content.Headers.ContentType?.MediaType.Equals(
                 "multipart/byteranges", StringComparison.OrdinalIgnoreCase
@@ -88,7 +95,7 @@ public async IAsyncEnumerable<Stream> DownloadDeltaPatchFileAsync(string relativ
             {
                 foreach (var content in multipart)
                 {
-                    await CopyToStreamAsync(content, memoryStream, progressInfo, totalSize, progress);
+                    await CopyToStreamAsync(content, memoryStream, progressInfo, progress);
                     memoryStream.Seek(0, SeekOrigin.Begin); // Reset memory stream position for reading
                     yield return memoryStream;
                     memoryStream.SetLength(0); // Clear memory stream for next part
@@ -101,7 +108,7 @@ public async IAsyncEnumerable<Stream> DownloadDeltaPatchFileAsync(string relativ
         }
     }
 
-    private static async Task CopyToStreamAsync(HttpContent content, Stream destination, ProgressInfo progressInfo, long totalSize, IProgress<(double Progress, double Speed)> progress)
+    private static async Task CopyToStreamAsync(HttpContent content, Stream destination, ProgressInfo progressInfo, IProgress<IDownloadProgress> progress)
     {
 #if NET6_0_OR_GREATER
         byte[] buffer = GC.AllocateUninitializedArray<byte>(81920);
@@ -123,7 +130,7 @@ private static async Task CopyToStreamAsync(HttpContent content, Stream destinat
                 speed = progressInfo.TotalRead / progressInfo.Stopwatch.Elapsed.TotalSeconds;
             }
 
-            progress?.Report(((double)progressInfo.TotalRead / totalSize, speed));
+            progress?.Report(new DownloadProgress(progressInfo.TotalSize, progressInfo.TotalRead, speed));
         }
     }
 
@@ -132,7 +139,15 @@ public void ValidateFiles(string baseFolder, Func<ValidationResult> callback) =>
 
     private class ProgressInfo
     {
+        public long TotalSize { get; set; }
         public long TotalRead { get; set; }
         public Stopwatch Stopwatch { get; } = new();
     }
+
+    private class DownloadProgress(long totalSize, long totalDownloaded, double speed) : IDownloadProgress
+    {
+        public long TotalSize { get; } = totalSize;
+        public long TotalDownloaded { get; } = totalDownloaded;
+        public double Speed { get; } = speed;
+    }
 }