diff --git a/trains/binding/frameworks/__init__.py b/trains/binding/frameworks/__init__.py
index 3e9dacbc..e83240ea 100644
--- a/trains/binding/frameworks/__init__.py
+++ b/trains/binding/frameworks/__init__.py
@@ -1,5 +1,9 @@
+import os
+import shutil
+import sys
 import threading
 import weakref
+from tempfile import mkstemp
 
 import six
 from pathlib2 import Path
@@ -200,7 +204,17 @@ class WeightsFileHandler(object):
                     trains_out_model.update_weights_package(weights_filenames=files, auto_delete_file=False,
                                                             target_filename=target_filename)
                 else:
-                    trains_out_model.update_weights(weights_filename=files[0], auto_delete_file=False)
+                    # create a copy of the stored file,
+                    # protect against someone deletes/renames the file before async upload finish is done
+                    target_filename = Path(files[0]).name
+                    # HACK: if pytorch-lightning is used, remove the temp '.part' file extension
+                    if sys.modules.get('pytorch_lightning') and target_filename.lower().endswith('.part'):
+                        target_filename = target_filename[:-len('.part')]
+                    fd, temp_file = mkstemp(prefix='.trains.upload_model_', suffix='.tmp')
+                    os.close(fd)
+                    shutil.copy(files[0], temp_file)
+                    trains_out_model.update_weights(weights_filename=temp_file, auto_delete_file=True,
+                                                    target_filename=target_filename)
             else:
                 trains_out_model.update_weights(weights_filename=None, register_uri=saved_path)
         except Exception as ex: