I work on a magazine and am used to uploading PDFs of features to Trello cards – I've been using Trello for a year or so this way.
Lately, the PDFs are taking a very long time to open when I have a card open. It's not because the file is too big, because if that was the case, Trello wouldn't upload the PDF at all. I always close cards when I'm not looking at them.
I'd appreciate any advice!