diff --git a/mdataToCoscine.ipynb b/mdataToCoscine.ipynb
index 00580f9..6db22c4 100644
--- a/mdataToCoscine.ipynb
+++ b/mdataToCoscine.ipynb
@@ -1568,44 +1568,17 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 23,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      "here_is_a_different_name.txt:   0%|          | 0.00/222 [00:00<?, ?B/s]"
-     ]
-    },
-    {
-     "ename": "RequestRejected",
-     "evalue": "Coscine rejected the request sent by the Coscine Python SDK with the following error message: {\"data\":{\"type\":\"https://datatracker.ietf.org/doc/html/rfc7231#section-6.5.8\",\"title\":\"Conflict\",\"status\":409,\"detail\":\"The blob with the key: \\u0022here_is_a_different_name.txt\\u0022 already exists and can\\u0027t be created. Use update instead.\",\"instance\":\"/api/v2/projects/41ea010a-92e2-4caf-8c28-bde8c96ff226/resources/67de7c6d-fdac-4ba9-91be-be4fc3c3f6b7/blobs/here_is_a_different_name.txt\",\"httpMethod\":\"POST\"},\"statusCode\":409,\"isSuccess\":false,\"traceId\":\"0HMVBP8G01VVV:0000000A\",\"pagination\":null,\"categories\":null}.",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
-      "\u001b[0;31mHTTPError\u001b[0m                                 Traceback (most recent call last)",
-      "File \u001b[0;32m~/.python/current/lib/python3.10/site-packages/coscine/client.py:420\u001b[0m, in \u001b[0;36mApiClient.send_request\u001b[0;34m(self, request, stream)\u001b[0m\n\u001b[1;32m    419\u001b[0m     logger\u001b[39m.\u001b[39mdebug(response\u001b[39m.\u001b[39mcontent\u001b[39m.\u001b[39mdecode(\u001b[39m\"\u001b[39m\u001b[39mutf-8\u001b[39m\u001b[39m\"\u001b[39m))\n\u001b[0;32m--> 420\u001b[0m response\u001b[39m.\u001b[39;49mraise_for_status()\n\u001b[1;32m    421\u001b[0m \u001b[39mreturn\u001b[39;00m ApiResponse(\u001b[39mself\u001b[39m, request, response)\n",
-      "File \u001b[0;32m~/.local/lib/python3.10/site-packages/requests/models.py:1021\u001b[0m, in \u001b[0;36mResponse.raise_for_status\u001b[0;34m(self)\u001b[0m\n\u001b[1;32m   1020\u001b[0m \u001b[39mif\u001b[39;00m http_error_msg:\n\u001b[0;32m-> 1021\u001b[0m     \u001b[39mraise\u001b[39;00m HTTPError(http_error_msg, response\u001b[39m=\u001b[39m\u001b[39mself\u001b[39m)\n",
-      "\u001b[0;31mHTTPError\u001b[0m: 409 Client Error: Conflict for url: https://coscine.rwth-aachen.de/coscine/api/v2/projects/41ea010a-92e2-4caf-8c28-bde8c96ff226/resources/67de7c6d-fdac-4ba9-91be-be4fc3c3f6b7/blobs/here_is_a_different_name.txt",
-      "\nThe above exception was the direct cause of the following exception:\n",
-      "\u001b[0;31mRequestRejected\u001b[0m                           Traceback (most recent call last)",
-      "\u001b[1;32m/workspaces/MetadataTransferRDMII/mdataToCoscine.ipynb Cell 49\u001b[0m line \u001b[0;36m4\n\u001b[1;32m      <a href='vscode-notebook-cell://codespaces%2Bautomatic-waffle-44wgwxp6rgxh7544/workspaces/MetadataTransferRDMII/mdataToCoscine.ipynb#X66sdnNjb2RlLXJlbW90ZQ%3D%3D?line=0'>1</a>\u001b[0m local_file_name \u001b[39m=\u001b[39m \u001b[39m\"\u001b[39m\u001b[39mcat_test_file.txt\u001b[39m\u001b[39m\"\u001b[39m\n\u001b[1;32m      <a href='vscode-notebook-cell://codespaces%2Bautomatic-waffle-44wgwxp6rgxh7544/workspaces/MetadataTransferRDMII/mdataToCoscine.ipynb#X66sdnNjb2RlLXJlbW90ZQ%3D%3D?line=1'>2</a>\u001b[0m coscine_file_name \u001b[39m=\u001b[39m \u001b[39m\"\u001b[39m\u001b[39mhere_is_a_different_name.txt\u001b[39m\u001b[39m\"\u001b[39m\n\u001b[0;32m----> <a href='vscode-notebook-cell://codespaces%2Bautomatic-waffle-44wgwxp6rgxh7544/workspaces/MetadataTransferRDMII/mdataToCoscine.ipynb#X66sdnNjb2RlLXJlbW90ZQ%3D%3D?line=3'>4</a>\u001b[0m resource\u001b[39m.\u001b[39;49mupload(coscine_file_name, local_file_name, metadata)\n",
-      "File \u001b[0;32m~/.python/current/lib/python3.10/site-packages/coscine/resource.py:613\u001b[0m, in \u001b[0;36mResource.upload\u001b[0;34m(self, path, handle, metadata, progress)\u001b[0m\n\u001b[1;32m    611\u001b[0m     \u001b[39mself\u001b[39m\u001b[39m.\u001b[39m_upload_blob_s3(path, handle)\n\u001b[1;32m    612\u001b[0m \u001b[39melse\u001b[39;00m:\n\u001b[0;32m--> 613\u001b[0m     \u001b[39mself\u001b[39;49m\u001b[39m.\u001b[39;49m_upload_blob(path, handle, progress)\n",
-      "File \u001b[0;32m~/.python/current/lib/python3.10/site-packages/coscine/resource.py:698\u001b[0m, in \u001b[0;36mResource._upload_blob\u001b[0;34m(self, path, handle, progress)\u001b[0m\n\u001b[1;32m    692\u001b[0m monitor \u001b[39m=\u001b[39m MultipartEncoderMonitor(\n\u001b[1;32m    693\u001b[0m     encoder,\n\u001b[1;32m    694\u001b[0m     \u001b[39mlambda\u001b[39;00m mon:\n\u001b[1;32m    695\u001b[0m         progress_callback(progress_bar, mon\u001b[39m.\u001b[39mbytes_read, progress)\n\u001b[1;32m    696\u001b[0m )\n\u001b[1;32m    697\u001b[0m headers \u001b[39m=\u001b[39m {\u001b[39m\"\u001b[39m\u001b[39mContent-Type\u001b[39m\u001b[39m\"\u001b[39m: monitor\u001b[39m.\u001b[39mcontent_type}\n\u001b[0;32m--> 698\u001b[0m \u001b[39mself\u001b[39;49m\u001b[39m.\u001b[39;49mclient\u001b[39m.\u001b[39;49mpost(uri, data\u001b[39m=\u001b[39;49mmonitor, headers\u001b[39m=\u001b[39;49mheaders)\n",
-      "File \u001b[0;32m~/.python/current/lib/python3.10/site-packages/coscine/client.py:551\u001b[0m, in \u001b[0;36mApiClient.post\u001b[0;34m(self, *args, **kwargs)\u001b[0m\n\u001b[1;32m    539\u001b[0m \u001b[39mdef\u001b[39;00m \u001b[39mpost\u001b[39m(\u001b[39mself\u001b[39m, \u001b[39m*\u001b[39margs, \u001b[39m*\u001b[39m\u001b[39m*\u001b[39mkwargs) \u001b[39m-\u001b[39m\u001b[39m>\u001b[39m ApiResponse:\n\u001b[1;32m    540\u001b[0m \u001b[39m    \u001b[39m\u001b[39m\"\"\"\u001b[39;00m\n\u001b[1;32m    541\u001b[0m \u001b[39m    Sends a POST request to the Coscine REST API.\u001b[39;00m\n\u001b[1;32m    542\u001b[0m \n\u001b[0;32m   (...)\u001b[0m\n\u001b[1;32m    549\u001b[0m \u001b[39m    Refer to ApiClient.request() for a list of exceptions.\u001b[39;00m\n\u001b[1;32m    550\u001b[0m \u001b[39m    \"\"\"\u001b[39;00m\n\u001b[0;32m--> 551\u001b[0m     \u001b[39mreturn\u001b[39;00m \u001b[39mself\u001b[39;49m\u001b[39m.\u001b[39;49mrequest(\u001b[39m\"\u001b[39;49m\u001b[39mPOST\u001b[39;49m\u001b[39m\"\u001b[39;49m, \u001b[39m*\u001b[39;49margs, \u001b[39m*\u001b[39;49m\u001b[39m*\u001b[39;49mkwargs)\n",
-      "File \u001b[0;32m~/.python/current/lib/python3.10/site-packages/coscine/client.py:460\u001b[0m, in \u001b[0;36mApiClient.request\u001b[0;34m(self, method, stream, *args, **kwargs)\u001b[0m\n\u001b[1;32m    433\u001b[0m \u001b[39m\u001b[39m\u001b[39m\"\"\"\u001b[39;00m\n\u001b[1;32m    434\u001b[0m \u001b[39mSends a request to the Coscine REST API. This method is used\u001b[39;00m\n\u001b[1;32m    435\u001b[0m \u001b[39minternally. As a user of the ApiClient you should use the methods\u001b[39;00m\n\u001b[0;32m   (...)\u001b[0m\n\u001b[1;32m    457\u001b[0m \u001b[39mSee coscine.ApiClient.handle_request_exception\u001b[39;00m\n\u001b[1;32m    458\u001b[0m \u001b[39m\"\"\"\u001b[39;00m\n\u001b[1;32m    459\u001b[0m request \u001b[39m=\u001b[39m requests\u001b[39m.\u001b[39mRequest(method, \u001b[39m*\u001b[39margs, \u001b[39m*\u001b[39m\u001b[39m*\u001b[39mkwargs)\n\u001b[0;32m--> 460\u001b[0m \u001b[39mreturn\u001b[39;00m \u001b[39mself\u001b[39;49m\u001b[39m.\u001b[39;49msend_request(request, stream)\n",
-      "File \u001b[0;32m~/.python/current/lib/python3.10/site-packages/coscine/client.py:423\u001b[0m, in \u001b[0;36mApiClient.send_request\u001b[0;34m(self, request, stream)\u001b[0m\n\u001b[1;32m    421\u001b[0m     \u001b[39mreturn\u001b[39;00m ApiResponse(\u001b[39mself\u001b[39m, request, response)\n\u001b[1;32m    422\u001b[0m \u001b[39mexcept\u001b[39;00m requests\u001b[39m.\u001b[39mexceptions\u001b[39m.\u001b[39mRequestException \u001b[39mas\u001b[39;00m error:\n\u001b[0;32m--> 423\u001b[0m     \u001b[39mself\u001b[39;49m\u001b[39m.\u001b[39;49mhandle_request_exception(error)\n\u001b[1;32m    424\u001b[0m     \u001b[39mraise\u001b[39;00m error\n",
-      "File \u001b[0;32m~/.python/current/lib/python3.10/site-packages/coscine/client.py:495\u001b[0m, in \u001b[0;36mApiClient.handle_request_exception\u001b[0;34m(exception)\u001b[0m\n\u001b[1;32m    490\u001b[0m \u001b[39mif\u001b[39;00m exception\u001b[39m.\u001b[39mresponse\u001b[39m.\u001b[39mstatus_code \u001b[39m==\u001b[39m \u001b[39m401\u001b[39m:\n\u001b[1;32m    491\u001b[0m     \u001b[39mraise\u001b[39;00m AuthenticationError(\n\u001b[1;32m    492\u001b[0m         \u001b[39m\"\u001b[39m\u001b[39mInvalid Coscine API token! The token was rejected \u001b[39m\u001b[39m\"\u001b[39m\n\u001b[1;32m    493\u001b[0m         \u001b[39m\"\u001b[39m\u001b[39mby Coscine. Check whether it is expired.\u001b[39m\u001b[39m\"\u001b[39m\n\u001b[1;32m    494\u001b[0m     ) \u001b[39mfrom\u001b[39;00m \u001b[39mexception\u001b[39;00m\n\u001b[0;32m--> 495\u001b[0m \u001b[39mraise\u001b[39;00m RequestRejected(\n\u001b[1;32m    496\u001b[0m     \u001b[39m\"\u001b[39m\u001b[39mCoscine rejected the request sent by the Coscine Python SDK \u001b[39m\u001b[39m\"\u001b[39m\n\u001b[1;32m    497\u001b[0m     \u001b[39m\"\u001b[39m\u001b[39mwith the following error message: \u001b[39m\u001b[39m\"\u001b[39m\n\u001b[1;32m    498\u001b[0m     \u001b[39mf\u001b[39m\u001b[39m\"\u001b[39m\u001b[39m{\u001b[39;00mexception\u001b[39m.\u001b[39mresponse\u001b[39m.\u001b[39mcontent\u001b[39m.\u001b[39mdecode(\u001b[39m'\u001b[39m\u001b[39mutf-8\u001b[39m\u001b[39m'\u001b[39m)\u001b[39m}\u001b[39;00m\u001b[39m.\u001b[39m\u001b[39m\"\u001b[39m\n\u001b[1;32m    499\u001b[0m ) \u001b[39mfrom\u001b[39;00m \u001b[39mexception\u001b[39;00m\n",
-      "\u001b[0;31mRequestRejected\u001b[0m: Coscine rejected the request sent by the Coscine Python SDK with the following error message: {\"data\":{\"type\":\"https://datatracker.ietf.org/doc/html/rfc7231#section-6.5.8\",\"title\":\"Conflict\",\"status\":409,\"detail\":\"The blob with the key: \\u0022here_is_a_different_name.txt\\u0022 already exists and can\\u0027t be created. Use update instead.\",\"instance\":\"/api/v2/projects/41ea010a-92e2-4caf-8c28-bde8c96ff226/resources/67de7c6d-fdac-4ba9-91be-be4fc3c3f6b7/blobs/here_is_a_different_name.txt\",\"httpMethod\":\"POST\"},\"statusCode\":409,\"isSuccess\":false,\"traceId\":\"0HMVBP8G01VVV:0000000A\",\"pagination\":null,\"categories\":null}."
-     ]
-    }
-   ],
+   "outputs": [],
    "source": [
     "local_file_name = \"cat_test_file.txt\"\n",
     "coscine_file_name = \"here_is_a_different_name.txt\"\n",
     "\n",
-    "resource.upload(coscine_file_name, local_file_name, metadata)"
+    "with open(local_file_name, 'rb') as f:\n",
+    "    resource.upload(coscine_file_name, f, metadata)\n",
+    "\n",
+    "# note: overwriting files will only work with Coscine Python SDK version 0.10.3 "
    ]
   },
   {
@@ -5878,7 +5851,9 @@
     "coscine_file_name = 'Pollen1003.jpg'\n",
     "\n",
     "with open('data/Pollen1003.jpg', \"rb\") as file_path:\n",
-    "    resource.upload(coscine_file_name, file_path, metadata)"
+    "    resource.upload(coscine_file_name, file_path, metadata)\n",
+    "\n",
+    "# note: overwriting files will only work with Coscine Python SDK version 0.10.3 "
    ]
   }
  ],