diff --git a/toonz/sources/toonz/colormodelviewer.cpp b/toonz/sources/toonz/colormodelviewer.cpp
index 730f77ed..ae7a0755 100644
--- a/toonz/sources/toonz/colormodelviewer.cpp
+++ b/toonz/sources/toonz/colormodelviewer.cpp
@@ -123,7 +123,10 @@ void ColorModelViewer::dragEnterEvent(QDragEnterEvent *event) {
     std::string type = fp.getType();
     if (type == "scr" || type == "tpl") return;
   }
-  event->acceptProposedAction();
+  // Force CopyAction
+  event->setDropAction(Qt::CopyAction);
+  // For files, don't accept original proposed action in case it's a move
+  event->accept();
 }
 
 //-----------------------------------------------------------------------------
@@ -138,7 +141,10 @@ void ColorModelViewer::dropEvent(QDropEvent *event) {
       loadImage(fp);
       setLevel(fp);
     }
-    event->acceptProposedAction();
+	// Force CopyAction
+	event->setDropAction(Qt::CopyAction);
+	// For files, don't accept original proposed action in case it's a move
+	event->accept();
   }
 }
 
diff --git a/toonz/sources/toonz/dvitemview.cpp b/toonz/sources/toonz/dvitemview.cpp
index debe1d77..e5c72404 100644
--- a/toonz/sources/toonz/dvitemview.cpp
+++ b/toonz/sources/toonz/dvitemview.cpp
@@ -40,6 +40,7 @@
 #include <QFileDialog>
 #include <QTextStream>
 #include <qdrawutil.h>
+#include <QMimeData>
 
 #include <stdint.h>  // for uint64_t
 
@@ -1515,15 +1516,29 @@ void DvItemViewer::resetVerticalScrollBar() {
 //-----------------------------------------------------------------------------
 
 void DvItemViewer::dragEnterEvent(QDragEnterEvent *event) {
-  if (m_model && m_model->acceptDrop(event->mimeData()))
-    event->acceptProposedAction();
+  const QMimeData *mimeData = event->mimeData();
+  if (m_model && m_model->acceptDrop(mimeData)) {
+    if (acceptResourceOrFolderDrop(mimeData->urls())) {
+      // Force CopyAction
+      event->setDropAction(Qt::CopyAction);
+      event->accept();
+    } else
+      event->acceptProposedAction();
+  }
 }
 
 //-----------------------------------------------------------------------------
 
 void DvItemViewer::dropEvent(QDropEvent *event) {
-  if (m_model && m_model->drop(event->mimeData()))
-    event->acceptProposedAction();
+  const QMimeData *mimeData = event->mimeData();
+  if (m_model && m_model->drop(mimeData)) {
+    if (acceptResourceOrFolderDrop(mimeData->urls())) {
+      // Force CopyAction
+      event->setDropAction(Qt::CopyAction);
+      event->accept();
+    } else
+      event->acceptProposedAction();
+  }
 }
 
 //-----------------------------------------------------------------------------
diff --git a/toonz/sources/toonz/flipbook.cpp b/toonz/sources/toonz/flipbook.cpp
index 4bc2e62e..98c28369 100644
--- a/toonz/sources/toonz/flipbook.cpp
+++ b/toonz/sources/toonz/flipbook.cpp
@@ -1760,7 +1760,8 @@ void ImageViewer::showHistogram() {
 
 void FlipBook::dragEnterEvent(QDragEnterEvent *e) {
   const QMimeData *mimeData = e->mimeData();
-  if (!acceptResourceDrop(mimeData->urls()) &&
+  bool isResourceDrop       = acceptResourceDrop(mimeData->urls());
+  if (!isResourceDrop &&
       !mimeData->hasFormat("application/vnd.toonz.drawings") &&
       !mimeData->hasFormat(CastItems::getMimeFormat()))
     return;
@@ -1784,18 +1785,31 @@ void FlipBook::dragEnterEvent(QDragEnterEvent *e) {
     }
   }
 
-  e->acceptProposedAction();
+  if (isResourceDrop) {
+    // Force CopyAction
+    e->setDropAction(Qt::CopyAction);
+    // For files, don't accept original proposed action in case it's a move
+    e->accept();
+  } else
+    e->acceptProposedAction();
 }
 
 //-----------------------------------------------------------------------------
 
 void FlipBook::dropEvent(QDropEvent *e) {
   const QMimeData *mimeData = e->mimeData();
+  bool isResourceDrop       = acceptResourceDrop(mimeData->urls());
   if (mimeData->hasUrls()) {
     for (const QUrl &url : mimeData->urls()) {
       TFilePath fp(url.toLocalFile().toStdWString());
       if (TFileType::getInfo(fp) != TFileType::UNKNOW_FILE) setLevel(fp);
-      e->acceptProposedAction();
+      if (isResourceDrop) {
+        // Force CopyAction
+        e->setDropAction(Qt::CopyAction);
+        // For files, don't accept original proposed action in case it's a move
+        e->accept();
+      } else
+        e->acceptProposedAction();
       return;
     }
   } else if (mimeData->hasFormat(
diff --git a/toonz/sources/toonz/sceneviewerevents.cpp b/toonz/sources/toonz/sceneviewerevents.cpp
index a0f68091..f9cd82a6 100644
--- a/toonz/sources/toonz/sceneviewerevents.cpp
+++ b/toonz/sources/toonz/sceneviewerevents.cpp
@@ -1578,6 +1578,14 @@ void SceneViewer::dropEvent(QDropEvent *e) {
     }
 
     IoCmd::loadResources(args);
+
+	if (acceptResourceOrFolderDrop(mimeData->urls())) {
+		// Force Copy Action
+		e->setDropAction(Qt::CopyAction);
+		// For files, don't accept original proposed action in case it's a move
+		e->accept();
+		return;
+	}
   }
   e->acceptProposedAction();
 }
diff --git a/toonz/sources/toonz/xshcellviewer.cpp b/toonz/sources/toonz/xshcellviewer.cpp
index eb0ed3e1..f1a0269c 100644
--- a/toonz/sources/toonz/xshcellviewer.cpp
+++ b/toonz/sources/toonz/xshcellviewer.cpp
@@ -3090,12 +3090,17 @@ void CellArea::contextMenuEvent(QContextMenuEvent *event) {
 //-----------------------------------------------------------------------------
 
 void CellArea::dragEnterEvent(QDragEnterEvent *e) {
-  if (acceptResourceOrFolderDrop(e->mimeData()->urls()) ||
+  bool isResourceOrFolderDrop = 
+	  acceptResourceOrFolderDrop(e->mimeData()->urls());
+  if (isResourceOrFolderDrop ||
       e->mimeData()->hasFormat(CastItems::getMimeFormat()) ||
       e->mimeData()->hasFormat("application/vnd.toonz.drawings")) {
     setDragTool(XsheetGUI::DragTool::makeDragAndDropDataTool(m_viewer));
+	// For file dragging force CopyAction
+	if (isResourceOrFolderDrop) e->setDropAction(Qt::CopyAction);
     m_viewer->dragToolClick(e);
-    e->acceptProposedAction();
+	// For files, don't accept original proposed action in case it's a move
+	isResourceOrFolderDrop ? e->accept() : e->acceptProposedAction();
   }
 }
 
@@ -3110,8 +3115,13 @@ void CellArea::dragLeaveEvent(QDragLeaveEvent *e) {
 
 void CellArea::dragMoveEvent(QDragMoveEvent *e) {
   if (!getDragTool()) return;
+  bool isResourceOrFolderDrop =
+	  acceptResourceOrFolderDrop(e->mimeData()->urls());
+  // For file dragging force CopyAction
+  if (isResourceOrFolderDrop) e->setDropAction(Qt::CopyAction);
   m_viewer->dragToolDrag(e);
-  e->acceptProposedAction();
+  // For files, don't accept original proposed action in case it's a move
+  isResourceOrFolderDrop ? e->accept() : e->acceptProposedAction();
 }
 
 //-----------------------------------------------------------------------------
@@ -3122,8 +3132,13 @@ void CellArea::dropEvent(QDropEvent *e) {
   if (e->source() == this) {
     e->setDropAction(Qt::MoveAction);
     e->accept();
+  } else if (acceptResourceOrFolderDrop(e->mimeData()->urls())) {
+	// For file dragging force CopyAction
+	e->setDropAction(Qt::CopyAction);
+	// For files, don't accept original proposed action in case it's a move
+	  e->accept();
   } else
-    e->acceptProposedAction();
+	e->acceptProposedAction();
 }
 
 //-----------------------------------------------------------------------------
diff --git a/toonz/sources/toonzqt/paletteviewer.cpp b/toonz/sources/toonzqt/paletteviewer.cpp
index 70ea76a2..c0b03f62 100644
--- a/toonz/sources/toonzqt/paletteviewer.cpp
+++ b/toonz/sources/toonzqt/paletteviewer.cpp
@@ -703,7 +703,10 @@ void PaletteViewer::dragEnterEvent(QDragEnterEvent *event) {
     if (!path.getType().empty() && path.getType() != "tpl") return;
   }
 
-  event->acceptProposedAction();
+  // Force CopyAction
+  event->setDropAction(Qt::CopyAction);
+  // For files, don't accept original proposed action in case it's a move
+  event->accept();
 }
 
 //-----------------------------------------------------------------------------
@@ -754,7 +757,10 @@ void PaletteViewer::dropEvent(QDropEvent *event) {
         }
       }
     }
-    event->acceptProposedAction();
+    // Force CopyAction
+    event->setDropAction(Qt::CopyAction);
+    // For files, don't accept original proposed action in case it's a move
+    event->accept();
     return;
   }