Guide of localization integration with Crowdin

Probably it exists somewhere, but I can’t find. I have 4 documents that I need to connect with project description in Crowdin, but there’s now attachment button, I can add only some texts. Documents are some kind of styleguides. How to connect them?

Hello there, check this one, should be working for crowdin enterprise version 110%, allows to add styleguides: Discover the right solution to enhance Crowdin experience