Upload multiple files on product buy

Hi guys, I’m trying to do something I don’t know if it’s possible, I’ve seen several plugins but none really satisfy all my needs.

I’ll try to describe what I want, I’m developing a shop (“woocomerce”) where people can send their album to print, but I have difficulty finding a plugin that allows uploading files through the product, because the size and quantity of files can vary greatly.

Can anyone advise me on any plugin?

The page I need help with: [log in to see the link]