Firebase storage: file().move is not implemented?

I'm developing locally with firebase emulator.

The front app create a project with some files uploaded to a 'tmp/' folder in storage bucket.

I need to move the uploaded files to the project folder once the project is saved. But when doing (a cloud function)

const storage = new Storage();
// also tried:
// const storage = admin.storage();

const bucket = storage.bucket(DEFAULT_BUCKET);
const destRoot = `${project.id}/files`;

// `tmpFiles` is an array of file paths
const movedfiles = await Promise.all(
  tmpFiles.map((file: string) =>
    bucket
      .file(`tmp/${file}`) 
      .move(`${destRoot}/${file}`)
      .then((result) => result[0].publicUrl())
      .catch(console.log)
  )
);

I got this error ApiError: file#copy failed with an error - Not Implemented

So it's no possible to move storage files for now?