Hello,

In Drupal 7 there is a module Webform Multiple File for multiple file uploading. Is there a similar component for Webforms for Backdrop CMS?

https://www.drupal.org/project/webform_multiple_file

I'm currently using the Backdrop module for roughly similar functionality:

https://backdropcms.org/project/webform_addmore

This solution partially solves the problem, but the Drupal 7 module has a more user-friendly system for uploading multiple files to the form and as well is easier to administer. 

I've also thought that the webform_addmore module probably has a broader purpose and would be a good solution for other types of components, but specifically for file uploads - and I mostly use it for photo uploads - the Drupal 7 module is easier to usage.