Basically the title: do I need a blank 1019 card (nothing but AC on it) or does it just need AC on it? I have a 1019 card with all of my saves for various games on it, including AC, but idk if it needs to be blank or not.

I don't think it matters. It might save/load slower if it has other content on it, but no one has tested that AFAIK

Alrighty. I can't imagine it loading slower by any significant amount. Thanks for the quick reply.