Uploading files larger than 262 MB via REST API

[SteveScott]

When I upload large files to SharePoint, I get the following error.
The request message is too big. The server does not allow messages larger than 262144000 bytes."}}}'}

So I am trying to load chunked uploads with the startUpload(), continueUpload(), and finishUpload() endpoints as specified in numerous documentations.

f"{url}/_api/web/getfilebyserverrelativeurl('{file_url}')/startupload(uploadID=guid'{upload_id}')"

However, to start an upload the file must already exist on the system. So I add an empty file first.

f"{url}/_api/web/getfolderbyserverrelativeurl('{sharepoint_folder_long}')/files/add(overwrite=true, url='{filename}'"

But when I call startupload after that, I get the error message:

{'500, {"error":{"code":"-1, Microsoft.FileStore.ErrorExceptionTag","message":{"lang":"en-US","value":"Error=Value=CannotAddDataNonContiguousData, Tag=0x2341f460"}}}'}

This error message does not exist on the internet!

Somehow I need to tell startUpload to overwrite the existing placeholder data.

[SteveScott]

The docs should be changed from Max size 2 GB to max size 262.1 MB