WooCommerce Upload files allow you to upload an unlimited number of files, without any file size restriction. Thanks to its innovative chunk upload technology, it can upload any file without restriction.EMAIL NOTIFICATION & ATTACHMENTS
By WooCommerce Upload Files The customer will be able to upload one or more files from the Product page, Order Detail page and/or during the Checkout process according to the purchased items …all done using visual progress bars! All the uploads will be bounded to the order and optionally to specific products.
NOTE: Some servers have restrictions preventing wp_email() to send attachments bigger than 5mb. If you are experiencing this kind of problem, you can simply install any SMTP emailer plugin. This kind of plugins will let you use any external email services (like Gmail, outlook, any SMTP server) to send emails.