diff --git a/AutoTx/AutoTx.cs b/AutoTx/AutoTx.cs
index f4dfd510f78aafde5a07c8af2e5b0b7e9f11dc51..eacf7e09ba89e8d585fabe8dccee57859833b5b4 100644
--- a/AutoTx/AutoTx.cs
+++ b/AutoTx/AutoTx.cs
@@ -601,6 +601,7 @@ namespace AutoTx
             
             try {
                 _status.CurrentTransferSrc = queued[0].GetDirectories()[0].FullName;
+                _status.CurrentTransferSize = GetDirectorySize(_status.CurrentTransferSrc);
             }
             catch (Exception ex) {
                 writeLog("Error checking for data to be transferred: " + ex.Message);
@@ -651,6 +652,7 @@ namespace AutoTx
                 MoveToGraceLocation();
                 SendTransferCompletedMail();
                 _status.CurrentTransferSrc = ""; // cleanup completed, so reset CurrentTransferSrc
+                _status.CurrentTransferSize = 0;
                 _transferredFiles.Clear(); // empty the list of transferred files
             }
         }
@@ -928,6 +930,17 @@ namespace AutoTx
             _lastUserDirCheck = DateTime.Now;
         }
 
+        /// <summary>
+        /// Recursively sum up size of all files under a given path.
+        /// </summary>
+        /// <param name="path"></param>
+        /// <returns>The total size in bytes.</returns>
+        public static long GetDirectorySize(string path) {
+            return new DirectoryInfo(path)
+                .GetFiles("*", SearchOption.AllDirectories)
+                .Sum(file => file.Length);
+        }
+
         #endregion
 
     }
diff --git a/AutoTx/RoboCommand.cs b/AutoTx/RoboCommand.cs
index 4129b3ba3b31c6b345b9265b2ae4ed40bdffee10..4cfa85bd609c35984a4d08861081518800ae514b 100644
--- a/AutoTx/RoboCommand.cs
+++ b/AutoTx/RoboCommand.cs
@@ -69,7 +69,8 @@ namespace AutoTx
                 _roboCommand.RetryOptions.RetryCount = 0;
                 _roboCommand.RetryOptions.RetryWaitTime = 2;
                 _roboCommand.Start();
-                writeLogDebug("Transfer started");
+                writeLogDebug("Transfer started, total size: " + 
+                    _status.CurrentTransferSize / MegaBytes + " MB");
             }
             catch (ManagementException ex) {
                 writeLog("Error in StartTransfer(): " + ex.Message);
diff --git a/AutoTx/XmlConfiguration.cs b/AutoTx/XmlConfiguration.cs
index 3b9c74cee1448aa93daac1de7d2289c2acfdad6d..90d0de47c3ca953dbd4b005cdb7c612faed08f18 100644
--- a/AutoTx/XmlConfiguration.cs
+++ b/AutoTx/XmlConfiguration.cs
@@ -128,6 +128,8 @@ namespace AutoTx
         bool _filecopyFinished;
         private bool _cleanShutdown;
 
+        private long _currentTransferSize;
+
         [XmlElement("LastStatusUpdate", DataType = "dateTime")]
         public DateTime LastStatusUpdate {
             get { return _lastStatusUpdate; }
@@ -190,6 +192,16 @@ namespace AutoTx
             }
         }
 
+        public long CurrentTransferSize {
+            get { return _currentTransferSize; }
+            set
+            {
+                _currentTransferSize = value;
+                log("CurrentTransferSize was updated (" + value + "), calling Serialize()...");
+                Serialize();
+            }
+        }
+
         public XmlStatus() {
             _currentTransferSrc = "";
             _currentTargetTmp = "";