In the builder, you can utilize the Capture tab to create a File Upload on a step.
See No. 7 below:
This is what it looks like in a run:
File Upload – This enables the user upload multiple files – perfect for document approval workflows.
These are the types of files you are able to upload: xlsx,xls,pptx,docx,ppt,doc,rtf,pdf,txt,mpga,wav,mov,qt,mp4,jpg,gif,png,ai,psd,hdpkg,zip,anx,xml,xps,jpeg
Please contact us if you have any questions.