diff --git a/source/core/FileSystems.h b/source/core/FileSystems.h
index 543a18a6e..d46d2796e 100644
--- a/source/core/FileSystems.h
+++ b/source/core/FileSystems.h
@@ -91,10 +91,10 @@ class TCustomFileSystem
     TRemoteFile *& File) = 0;
   virtual void __fastcall ReadSymlink(TRemoteFile * SymLinkFile,
     TRemoteFile *& File) = 0;
-  virtual void __fastcall RenameFile(const UnicodeString FileName, const TRemoteFile * File,
-    const UnicodeString NewName) = 0;
-  virtual void __fastcall CopyFile(const UnicodeString FileName, const TRemoteFile * File,
-    const UnicodeString NewName) = 0;
+  virtual void __fastcall RenameFile(
+    const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool Overwrite) = 0;
+  virtual void __fastcall CopyFile(
+    const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool Overwrite) = 0;
   virtual TStrings * __fastcall GetFixedPaths() = 0;
   virtual void __fastcall SpaceAvailable(const UnicodeString Path,
     TSpaceAvailable & ASpaceAvailable) = 0;
diff --git a/source/core/FtpFileSystem.cpp b/source/core/FtpFileSystem.cpp
index 7887616aa..f05febcd9 100644
--- a/source/core/FtpFileSystem.cpp
+++ b/source/core/FtpFileSystem.cpp
@@ -2519,8 +2519,8 @@ void __fastcall TFTPFileSystem::ReadSymlink(TRemoteFile * SymlinkFile,
   }
 }
 //---------------------------------------------------------------------------
-void __fastcall TFTPFileSystem::RenameFile(const UnicodeString AFileName, const TRemoteFile * /*File*/,
-  const UnicodeString ANewName)
+void __fastcall TFTPFileSystem::RenameFile(
+  const UnicodeString & AFileName, const TRemoteFile *, const UnicodeString & ANewName, bool DebugUsedArg(Overwrite))
 {
   UnicodeString FileName = AbsolutePath(AFileName, false);
   UnicodeString NewName = AbsolutePath(ANewName, false);
@@ -2541,8 +2541,8 @@ void __fastcall TFTPFileSystem::RenameFile(const UnicodeString AFileName, const
   }
 }
 //---------------------------------------------------------------------------
-void __fastcall TFTPFileSystem::CopyFile(const UnicodeString FileName, const TRemoteFile * /*File*/,
-  const UnicodeString NewName)
+void __fastcall TFTPFileSystem::CopyFile(
+  const UnicodeString & FileName, const TRemoteFile *, const UnicodeString & NewName, bool DebugUsedArg(Overwrite))
 {
   DebugAssert(SupportsSiteCommand(CopySiteCommand));
   EnsureLocation();
diff --git a/source/core/FtpFileSystem.h b/source/core/FtpFileSystem.h
index 0c6f5c5e2..942854766 100644
--- a/source/core/FtpFileSystem.h
+++ b/source/core/FtpFileSystem.h
@@ -80,10 +80,10 @@ friend class TFileListHelper;
     TRemoteFile *& File);
   virtual void __fastcall ReadSymlink(TRemoteFile * SymlinkFile,
     TRemoteFile *& File);
-  virtual void __fastcall RenameFile(const UnicodeString FileName, const TRemoteFile * File,
-    const UnicodeString NewName);
-  virtual void __fastcall CopyFile(const UnicodeString FileName, const TRemoteFile * File,
-    const UnicodeString NewName);
+  virtual void __fastcall RenameFile(
+    const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool Overwrite);
+  virtual void __fastcall CopyFile(
+    const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool Overwrite);
   virtual TStrings * __fastcall GetFixedPaths();
   virtual void __fastcall SpaceAvailable(const UnicodeString Path,
     TSpaceAvailable & ASpaceAvailable);
diff --git a/source/core/S3FileSystem.cpp b/source/core/S3FileSystem.cpp
index 1a39d921d..c4397c02f 100644
--- a/source/core/S3FileSystem.cpp
+++ b/source/core/S3FileSystem.cpp
@@ -1356,21 +1356,21 @@ void __fastcall TS3FileSystem::DeleteFile(const UnicodeString AFileName,
   }
 }
 //---------------------------------------------------------------------------
-void __fastcall TS3FileSystem::RenameFile(const UnicodeString FileName, const TRemoteFile * File,
-  const UnicodeString NewName)
+void __fastcall TS3FileSystem::RenameFile(
+  const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool Overwrite)
 {
   if (DebugAlwaysTrue(File != NULL) && File->IsDirectory)
   {
     throw Exception(LoadStr(NOTSUPPORTED));
   }
-  CopyFile(FileName, File, NewName);
+  CopyFile(FileName, File, NewName, Overwrite);
   TRmSessionAction DummyAction(FTerminal->ActionLog, FileName);
   DeleteFile(FileName, File, dfForceDelete, DummyAction);
   DummyAction.Cancel();
 }
 //---------------------------------------------------------------------------
-void __fastcall TS3FileSystem::CopyFile(const UnicodeString AFileName, const TRemoteFile * File,
-  const UnicodeString ANewName)
+void __fastcall TS3FileSystem::CopyFile(
+  const UnicodeString & AFileName, const TRemoteFile * File, const UnicodeString & ANewName, bool DebugUsedArg(Overwrite))
 {
   if (DebugAlwaysTrue(File != NULL) && File->IsDirectory)
   {
diff --git a/source/core/S3FileSystem.h b/source/core/S3FileSystem.h
index 4f47f38bc..8a1ce60be 100644
--- a/source/core/S3FileSystem.h
+++ b/source/core/S3FileSystem.h
@@ -92,10 +92,10 @@ class TS3FileSystem : public TCustomFileSystem
     TRemoteFile *& File);
   virtual void __fastcall ReadSymlink(TRemoteFile * SymLinkFile,
     TRemoteFile *& File);
-  virtual void __fastcall RenameFile(const UnicodeString FileName, const TRemoteFile * File,
-    const UnicodeString NewName);
-  virtual void __fastcall CopyFile(const UnicodeString FileName, const TRemoteFile * File,
-    const UnicodeString NewName);
+  virtual void __fastcall RenameFile(
+    const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool Overwrite);
+  virtual void __fastcall CopyFile(
+    const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool Overwrite);
   virtual TStrings * __fastcall GetFixedPaths();
   virtual void __fastcall SpaceAvailable(const UnicodeString Path,
     TSpaceAvailable & ASpaceAvailable);
diff --git a/source/core/ScpFileSystem.cpp b/source/core/ScpFileSystem.cpp
index bdaeab227..e187be6c3 100644
--- a/source/core/ScpFileSystem.cpp
+++ b/source/core/ScpFileSystem.cpp
@@ -1172,14 +1172,14 @@ void __fastcall TSCPFileSystem::DeleteFile(const UnicodeString FileName,
   ExecCommand(fsDeleteFile, ARRAYOFCONST((DelimitStr(FileName))));
 }
 //---------------------------------------------------------------------------
-void __fastcall TSCPFileSystem::RenameFile(const UnicodeString FileName, const TRemoteFile * /*File*/,
-  const UnicodeString NewName)
+void __fastcall TSCPFileSystem::RenameFile(
+  const UnicodeString & FileName, const TRemoteFile *, const UnicodeString & NewName, bool DebugUsedArg(Overwrite))
 {
   ExecCommand(fsRenameFile, ARRAYOFCONST((DelimitStr(FileName), DelimitStr(NewName))));
 }
 //---------------------------------------------------------------------------
-void __fastcall TSCPFileSystem::CopyFile(const UnicodeString FileName, const TRemoteFile * /*File*/,
-  const UnicodeString NewName)
+void __fastcall TSCPFileSystem::CopyFile(
+  const UnicodeString & FileName, const TRemoteFile *, const UnicodeString & NewName, bool DebugUsedArg(Overwrite))
 {
   UnicodeString DelimitedFileName = DelimitStr(FileName);
   UnicodeString DelimitedNewName = DelimitStr(NewName);
diff --git a/source/core/ScpFileSystem.h b/source/core/ScpFileSystem.h
index 17a8f8563..12f01dd88 100644
--- a/source/core/ScpFileSystem.h
+++ b/source/core/ScpFileSystem.h
@@ -68,10 +68,10 @@ class TSCPFileSystem : public TCustomFileSystem
     TRemoteFile *& File);
   virtual void __fastcall ReadSymlink(TRemoteFile * SymlinkFile,
     TRemoteFile *& File);
-  virtual void __fastcall RenameFile(const UnicodeString FileName, const TRemoteFile * File,
-    const UnicodeString NewName);
-  virtual void __fastcall CopyFile(const UnicodeString FileName, const TRemoteFile * File,
-    const UnicodeString NewName);
+  virtual void __fastcall RenameFile(
+    const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool Overwrite);
+  virtual void __fastcall CopyFile(
+    const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool Overwrite);
   virtual TStrings * __fastcall GetFixedPaths();
   virtual void __fastcall SpaceAvailable(const UnicodeString Path,
     TSpaceAvailable & ASpaceAvailable);
diff --git a/source/core/SftpFileSystem.cpp b/source/core/SftpFileSystem.cpp
index a29fa9be8..bf1e9b1c1 100644
--- a/source/core/SftpFileSystem.cpp
+++ b/source/core/SftpFileSystem.cpp
@@ -3842,8 +3842,8 @@ void __fastcall TSFTPFileSystem::DeleteFile(const UnicodeString FileName,
   DoDeleteFile(FileName, Type);
 }
 //---------------------------------------------------------------------------
-void __fastcall TSFTPFileSystem::RenameFile(const UnicodeString FileName, const TRemoteFile * /*File*/,
-  const UnicodeString NewName)
+void __fastcall TSFTPFileSystem::RenameFile(
+  const UnicodeString & FileName, const TRemoteFile *, const UnicodeString & NewName, bool DebugUsedArg(Overwrite))
 {
   TSFTPPacket Packet(SSH_FXP_RENAME);
   UnicodeString RealName = LocalCanonify(FileName);
@@ -3878,7 +3878,7 @@ void TSFTPFileSystem::DoCloseRemoteIfOpened(const RawByteString & Handle)
 }
 //---------------------------------------------------------------------------
 void __fastcall TSFTPFileSystem::CopyFile(
-  const UnicodeString FileName, const TRemoteFile * File, const UnicodeString NewName)
+  const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool DebugUsedArg(Overwrite))
 {
   UnicodeString FileNameCanonical = Canonify(FileName);
   bool Encrypted = FTerminal->IsFileEncrypted(FileNameCanonical);
@@ -4897,7 +4897,7 @@ void __fastcall TSFTPFileSystem::Source(
     // on VShell it failed
     FILE_OPERATION_LOOP_BEGIN
     {
-      RenameFile(OpenParams.RemoteFileName, NULL, DestFileName);
+      RenameFile(OpenParams.RemoteFileName, NULL, DestFileName, false);
     }
     FILE_OPERATION_LOOP_END_CUSTOM(
       FMTLOAD(RENAME_AFTER_RESUME_ERROR,
diff --git a/source/core/SftpFileSystem.h b/source/core/SftpFileSystem.h
index aa239f327..ed521fe14 100644
--- a/source/core/SftpFileSystem.h
+++ b/source/core/SftpFileSystem.h
@@ -83,10 +83,10 @@ friend class TSFTPBusy;
     TRemoteFile *& File);
   virtual void __fastcall ReadSymlink(TRemoteFile * SymlinkFile,
     TRemoteFile *& File);
-  virtual void __fastcall RenameFile(const UnicodeString FileName, const TRemoteFile * File,
-    const UnicodeString NewName);
-  virtual void __fastcall CopyFile(const UnicodeString FileName, const TRemoteFile * File,
-    const UnicodeString NewName);
+  virtual void __fastcall RenameFile(
+    const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool Overwrite);
+  virtual void __fastcall CopyFile(
+    const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool Overwrite);
   virtual TStrings * __fastcall GetFixedPaths();
   virtual void __fastcall SpaceAvailable(const UnicodeString Path,
     TSpaceAvailable & ASpaceAvailable);
diff --git a/source/core/Terminal.cpp b/source/core/Terminal.cpp
index edc2dcea7..57cfbb33d 100644
--- a/source/core/Terminal.cpp
+++ b/source/core/Terminal.cpp
@@ -4943,7 +4943,7 @@ bool __fastcall TTerminal::DoRenameFile(
         try
         {
           DebugAssert(FFileSystem);
-          FFileSystem->RenameFile(FileName, File, NewName);
+          FFileSystem->RenameFile(FileName, File, NewName, !DontOverwrite);
         }
         catch(Exception & E)
         {
@@ -5044,8 +5044,8 @@ bool __fastcall TTerminal::MoveFiles(
   return Result;
 }
 //---------------------------------------------------------------------------
-void __fastcall TTerminal::DoCopyFile(const UnicodeString FileName, const TRemoteFile * File,
-  const UnicodeString NewName)
+void __fastcall TTerminal::DoCopyFile(
+  const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool DontOverwrite)
 {
   TRetryOperationLoop RetryLoop(this);
   do
@@ -5066,7 +5066,7 @@ void __fastcall TTerminal::DoCopyFile(const UnicodeString FileName, const TRemot
       {
         FileSystem = GetFileSystemForCapability(fcRemoteCopy);
       }
-      FileSystem->CopyFile(FileName, File, NewName);
+      FileSystem->CopyFile(FileName, File, NewName, !DontOverwrite);
     }
     catch(Exception & E)
     {
@@ -5085,7 +5085,7 @@ void __fastcall TTerminal::CopyFile(const UnicodeString FileName,
   UnicodeString NewName = UnixIncludeTrailingBackslash(Params.Target) +
     MaskFileName(UnixExtractFileName(FileName), Params.FileMask);
   LogEvent(FORMAT(L"Copying file \"%s\" to \"%s\".", (FileName, NewName)));
-  DoCopyFile(FileName, File, NewName);
+  DoCopyFile(FileName, File, NewName, Params.DontOverwrite);
   ReactOnCommand(fsCopyFile);
 }
 //---------------------------------------------------------------------------
@@ -5095,7 +5095,7 @@ bool __fastcall TTerminal::CopyFiles(TStrings * FileList, const UnicodeString Ta
   TMoveFileParams Params;
   Params.Target = Target;
   Params.FileMask = FileMask;
-  Params.DontOverwrite = false; // not used
+  Params.DontOverwrite = true; // not used
   DirectoryModified(Target, true);
   return ProcessFiles(FileList, foRemoteCopy, CopyFile, &Params);
 }
diff --git a/source/core/Terminal.h b/source/core/Terminal.h
index d7c444c21..665c1f15d 100644
--- a/source/core/Terminal.h
+++ b/source/core/Terminal.h
@@ -282,7 +282,8 @@ friend class TParallelOperation;
   bool __fastcall DoRenameFile(
     const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool Move, bool DontOverwrite);
   bool __fastcall DoMoveFile(const UnicodeString & FileName, const TRemoteFile * File, /*const TMoveFileParams*/ void * Param);
-  void __fastcall DoCopyFile(const UnicodeString FileName, const TRemoteFile * File, const UnicodeString NewName);
+  void __fastcall DoCopyFile(
+    const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool DontOverwrite);
   void __fastcall DoChangeFileProperties(const UnicodeString FileName,
     const TRemoteFile * File, const TRemoteProperties * Properties);
   void __fastcall DoChangeDirectory();
diff --git a/source/core/WebDAVFileSystem.cpp b/source/core/WebDAVFileSystem.cpp
index 0f2ff2bb4..4cbeed302 100644
--- a/source/core/WebDAVFileSystem.cpp
+++ b/source/core/WebDAVFileSystem.cpp
@@ -1096,48 +1096,46 @@ void __fastcall TWebDAVFileSystem::DeleteFile(const UnicodeString FileName,
   DiscardLock(Path);
 }
 //---------------------------------------------------------------------------
-int __fastcall TWebDAVFileSystem::RenameFileInternal(const UnicodeString & FileName,
-  const UnicodeString & NewName)
+int __fastcall TWebDAVFileSystem::RenameFileInternal(
+  const UnicodeString & FileName, const UnicodeString & NewName, bool Overwrite)
 {
-  const int Overwrite = 1;
   return ne_move(FSessionContext->NeonSession, Overwrite, PathToNeon(FileName), PathToNeon(NewName));
 }
 //---------------------------------------------------------------------------
-void __fastcall TWebDAVFileSystem::RenameFile(const UnicodeString FileName, const TRemoteFile * /*File*/,
-  const UnicodeString NewName)
+void __fastcall TWebDAVFileSystem::RenameFile(
+  const UnicodeString & FileName, const TRemoteFile *, const UnicodeString & NewName, bool Overwrite)
 {
   ClearNeonError();
   TOperationVisualizer Visualizer(FTerminal->UseBusyCursor);
 
   UnicodeString Path = FileName;
-  int NeonStatus = RenameFileInternal(Path, NewName);
+  int NeonStatus = RenameFileInternal(Path, NewName, Overwrite);
   if (IsValidRedirect(NeonStatus, Path))
   {
-    NeonStatus = RenameFileInternal(Path, NewName);
+    NeonStatus = RenameFileInternal(Path, NewName, Overwrite);
   }
   CheckStatus(NeonStatus);
   // See a comment in DeleteFile
   DiscardLock(PathToNeon(Path));
 }
 //---------------------------------------------------------------------------
-int __fastcall TWebDAVFileSystem::CopyFileInternal(const UnicodeString & FileName,
-  const UnicodeString & NewName)
+int __fastcall TWebDAVFileSystem::CopyFileInternal(
+  const UnicodeString & FileName, const UnicodeString & NewName, bool Overwrite)
 {
-  // 0 = no overwrite
-  return ne_copy(FSessionContext->NeonSession, 0, NE_DEPTH_INFINITE, PathToNeon(FileName), PathToNeon(NewName));
+  return ne_copy(FSessionContext->NeonSession, Overwrite, NE_DEPTH_INFINITE, PathToNeon(FileName), PathToNeon(NewName));
 }
 //---------------------------------------------------------------------------
-void __fastcall TWebDAVFileSystem::CopyFile(const UnicodeString FileName, const TRemoteFile * /*File*/,
-  const UnicodeString NewName)
+void __fastcall TWebDAVFileSystem::CopyFile(
+  const UnicodeString & FileName, const TRemoteFile *, const UnicodeString & NewName, bool Overwrite)
 {
   ClearNeonError();
   TOperationVisualizer Visualizer(FTerminal->UseBusyCursor);
 
   UnicodeString Path = FileName;
-  int NeonStatus = CopyFileInternal(Path, NewName);
+  int NeonStatus = CopyFileInternal(Path, NewName, Overwrite);
   if (IsValidRedirect(NeonStatus, Path))
   {
-    NeonStatus = CopyFileInternal(Path, NewName);
+    NeonStatus = CopyFileInternal(Path, NewName, Overwrite);
   }
   CheckStatus(NeonStatus);
 }
diff --git a/source/core/WebDAVFileSystem.h b/source/core/WebDAVFileSystem.h
index fe2a85f78..70ab044db 100644
--- a/source/core/WebDAVFileSystem.h
+++ b/source/core/WebDAVFileSystem.h
@@ -71,10 +71,10 @@ class TWebDAVFileSystem : public TCustomFileSystem
     TRemoteFile *& File);
   virtual void __fastcall ReadSymlink(TRemoteFile * SymlinkFile,
     TRemoteFile *& File);
-  virtual void __fastcall RenameFile(const UnicodeString FileName, const TRemoteFile * File,
-    const UnicodeString NewName);
-  virtual void __fastcall CopyFile(const UnicodeString FileName, const TRemoteFile * File,
-    const UnicodeString NewName);
+  virtual void __fastcall RenameFile(
+    const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool Overwrite);
+  virtual void __fastcall CopyFile(
+    const UnicodeString & FileName, const TRemoteFile * File, const UnicodeString & NewName, bool Overwrite);
   virtual TStrings * __fastcall GetFixedPaths();
   virtual void __fastcall SpaceAvailable(const UnicodeString Path,
     TSpaceAvailable & ASpaceAvailable);
@@ -189,8 +189,8 @@ class TWebDAVFileSystem : public TCustomFileSystem
   UnicodeString __fastcall GetRedirectUrl();
   UnicodeString __fastcall ParsePathFromUrl(const UnicodeString & Url);
   int __fastcall ReadDirectoryInternal(const UnicodeString & Path, TRemoteFileList * FileList);
-  int __fastcall RenameFileInternal(const UnicodeString & FileName, const UnicodeString & NewName);
-  int __fastcall CopyFileInternal(const UnicodeString & FileName, const UnicodeString & NewName);
+  int __fastcall RenameFileInternal(const UnicodeString & FileName, const UnicodeString & NewName, bool Overwrite);
+  int __fastcall CopyFileInternal(const UnicodeString & FileName, const UnicodeString & NewName, bool Overwrite);
   bool __fastcall IsValidRedirect(int NeonStatus, UnicodeString & Path);
   UnicodeString __fastcall DirectoryPath(UnicodeString Path);
   UnicodeString __fastcall FilePath(const TRemoteFile * File);