Cannot create an upload session on a folder

Question

I am trying to create an upload session to upload a file to a certain folder:

POST 
https://graph.microsoft.com/v1.0/{{tenant}}/drives/{{drive_id}}/items/XXXXXNHXZFZ3MVQNYJE3LWRLV7FJKHA4/createUploadSession


{
  "@microsoft.graph.conflictBehavior": "fail",
  "description": "test",
  "fileSize": 1234,
  "name": "filename1.txt"
}

The item given in the path is a folder and I get its info with GET request.

Issuing a upload session fails with the error code:

{
    "error": {
        "code": "nameAlreadyExists",
        "message": "Cannot create an upload session on a folder",
        "innerError": {
            "date": "2023-06-02T12:39:13",
            "request-id": "13633383-ad65-4fef-ab89-39dc7f940ab2",
            "client-request-id": "13633383-ad65-4fef-ab89-39dc7f940ab2"
        }
    }
}

How to fix that?

Answer 1

Hi @anna,

The error response indicates that you are trying to create an upload session on a folder instead of a file. Uploading files using an upload session is usually done for individual files, not for folders.

Here it is recommended to use the path：

https://graph.microsoft.com/v1.0/drives/root:/Documents/55/filename1.txt:/createUploadSession

Here is a test for your reference:

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