Index: sources/storage/FileHandler.h
===================================================================
diff -u -r6210028a421d6259963bf172efbe4f23abfecf2f -r1f5b2250ae70d305654d014a9aa1fd8baa29779c
--- sources/storage/FileHandler.h	(.../FileHandler.h)	(revision 6210028a421d6259963bf172efbe4f23abfecf2f)
+++ sources/storage/FileHandler.h	(.../FileHandler.h)	(revision 1f5b2250ae70d305654d014a9aa1fd8baa29779c)
@@ -6,8 +6,8 @@
  * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
  *
  * \file    FileHandler.h
- * \author  (last)      Behrouz NematiPour
- * \date    (last)      15-Oct-2022
+ * \author  (last)      Vy
+ * \date    (last)      26-Apr-2023
  * \author  (original)  Behrouz NematiPour
  * \date    (original)  26-Aug-2020
  *
@@ -38,7 +38,6 @@
  */
 class FileHandler
 {
-    static void errOut(const QString &vMessage);
 
 public:
     enum FileCopyError_Enums {
@@ -58,6 +57,8 @@
     };
 
 public:
+    static void errOut      (const QString &vMessage);
+
     static bool write       (const QString &vFileName, const QString &vContent, bool vAppend = true );
     static bool read        (const QString &vFileName,       QString &vContent, bool vAppend = false);
     static bool read        (const QString &vFileName,   QJsonObject &vContent, QJsonParseError *error = nullptr);
@@ -69,6 +70,7 @@
     static bool makeFolder  (const QString     &vFolder);
     static bool isMounted   (const QString     &vPath, bool *vIsReadOnly = nullptr);
 
+    static bool tmpUsable   ();
 
     static QFileInfoList find(const QString &vPath, QStringList vNameFilters, quint8 vRetainPercent);
     static QFileInfoList find(const QString &vPath, QStringList vNameFilters);
@@ -143,6 +145,8 @@
         // close source
         srcFile.close();
 
+        //DEBUG qDebug()<< dstFile.fileName() <<" destination file size : " << dstFile.size() << " src==dest ? " << (dstFile.size() == totalSize);
+
         // close destination
         if ( ! dstFile.flush() )                                            { err = eDstFlushError       ; goto lErr; }
         dstFile.close();