File upload feature is available for Pro and Elite plans.
This feature lets your customers upload a file up to 20 MB of any file type with new orders.
The file will be linked to the new order both in the shopping cart and Shopify order admin.
If you want customers to upload more than one file they can do this through a zip file or you can add multiple file upload options to your option set.
When a file is uploaded, you can add a fixed value or use a formula to calculate the value associated with uploading a file.
Discounts can also be added to file upload options.