Index: sources/storage/logger.h
===================================================================
diff -u -r30f83b2813e68ae3c2806399bf808b642c215b67 -rd04653f0fbf1ed98178b6c7094beb4ec226a777f
--- sources/storage/logger.h	(.../logger.h)	(revision 30f83b2813e68ae3c2806399bf808b642c215b67)
+++ sources/storage/logger.h	(.../logger.h)	(revision d04653f0fbf1ed98178b6c7094beb4ec226a777f)
@@ -70,30 +70,31 @@
 
 private:
     QDir _dir;
+    QString _prefix;
     QHash<LogType, QString     > _logPathNames;
-    QHash<LogType, const char *> _logBasePathNames {
-        { LogType::eLogBasic,  "log/" },
-        { LogType::eLogEvent,  "log/" },
-        { LogType::eLogDatum,  "log/" },
-        { LogType::eLogError,  "log/" },
+    const QHash<LogType, const char *> _logBasePathNames {
+        { LogType::eLogBasic,  "log/"       },
+        { LogType::eLogEvent,  "log/"       },
+        { LogType::eLogDatum,  "log/"       },
+        { LogType::eLogError,  "service/"   },
     };
-    QHash<LogType, const char *> _logPrefix { // Will be used for the logging in the file
+    const QHash<LogType, const char *> _logPrefix { // Will be used for the logging in the file
         { LogType::eLogBasic,  ""  }, // Object itself tells what it is
         { LogType::eLogEvent,  "E" },
         { LogType::eLogDatum,  "D" },
         { LogType::eLogError,  ""  }, // it has its own file and all the content is Error
     };
-    QHash<LogType, const char *> _logTypeName { // Will be used for for information
+    const QHash<LogType, const char *> _logTypeName { // Will be used for for information
         { LogType::eLogBasic,  "Basic"  }, // Object itself tells what it is
-        { LogType::eLogEvent,  "Event" },
-        { LogType::eLogDatum,  "Datum" },
+        { LogType::eLogEvent,  "Event"  },
+        { LogType::eLogDatum,  "Datum"  },
         { LogType::eLogError,  "Error"  }, // it has its own file and all the content is Error
     };
-    QHash<LogType, const char *> _logFileNameBase {
-        { LogType::eLogBasic,  "denali.log" },
-        { LogType::eLogEvent,  "denali.log" },
-        { LogType::eLogDatum,  "denali.log" },
-        { LogType::eLogError,  "denali.err" },
+    const QHash<LogType, const char *> _logFileNameExt {
+        { LogType::eLogBasic,  ".log" },
+        { LogType::eLogEvent,  ".log" },
+        { LogType::eLogDatum,  ".log" },
+        { LogType::eLogError,  ".err" },
         };
 
     const char *_dateFormat = "yyyy_MM_dd";
@@ -105,7 +106,10 @@
     QString     _logFileName     = "";
 
     QFutureWatcher<int> _exportWatcher;
+    QFutureWatcher<int> _removeOldLogsWatcher;
 
+    const quint8        _removeOldLogsDaysOlderThan = 3;
+
     QThread       *_thread       = nullptr;
     bool           _init         = false;
 
@@ -144,6 +148,13 @@
      */
     void didExport();
 
+// ----- Remove Old Logs structure
+private slots:
+    bool concurrentRemoveOldLogs();
+    void         onRemoveOldLogs();
+signals:
+    void        didRemoveOldLogs();
+
 // ----- logging structure
 private slots:
     void onLog  (const QString &vContent, LogType vLogType);