Hi,
This is just a suggestion for the Trello team to solve something I run into a lot. Sometimes a card gets filled with attachments, and a brief or other important documents we use frequently get lost on the card. I know there are some ways I could troubleshoot this, but I think it would be a simple add to be able to pin attachments to the top of the stack.
Food for thought! I would love to see it in an update!