Upload File: Multipart-formdata

Hey @Kirst, welcome to the community.

As far as I know, sending data and the file at the same time as multipart/form-data it’s yet not possible. A workaround would be sending the file and then with the ID returned doing a put with the metadata ( name and parent ) assuming, of course, the API allows you to do so. To send the file check the example below.
If something is not clear simply get back to me.

{
  "nodes": [
    {
      "parameters": {},
      "name": "Start",
      "type": "n8n-nodes-base.start",
      "typeVersion": 1,
      "position": [
        250,
        300
      ]
    },
    {
      "parameters": {
        "requestMethod": "POST",
        "url": "https://webhook.site/3786832a-7b75-43bb-a71f-3156a4c76526",
        "jsonParameters": true,
        "options": {
          "bodyContentType": "multipart-form-data"
        },
        "sendBinaryData": true,
        "binaryPropertyName": "file:data"
      },
      "name": "HTTP Request",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 1,
      "position": [
        890,
        300
      ]
    },
    {
      "parameters": {
        "url": "https://i.ytimg.com/vi/MPV2METPeJU/maxresdefault.jpg",
        "responseFormat": "file",
        "options": {}
      },
      "name": "HTTP Request1",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 1,
      "position": [
        540,
        300
      ]
    }
  ],
  "connections": {
    "Start": {
      "main": [
        [
          {
            "node": "HTTP Request1",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "HTTP Request1": {
      "main": [
        [
          {
            "node": "HTTP Request",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}