private handleAddFiles = (files: any) => {
  const filesData = files.forEach(({ name, size, type, uuid }) => ({ name, size, type, uuid }));

  files.forEach(file => {
    const uuid = /[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/g.exec(file.preview)[0];
    file['uuid'] = uuid;
  });

  this.setState({
    files: this.state.files.concat(files),
    filesData: this.state.files.concat(filesData)
  })
  console.log(this.state.filesData); //undefined
}