I smoke whole leaf almost exclusively. I control mold by drying the tobacco to just the point where mold won’t grow. You can store it a long time this way, no problem.
If mold does start to grow, it usually begins on the central rib, which you probably aren’t smoking anyway. If that happens, just dry it out more and the mold growth will stop. No harm done to the smokeable part of the leaf. It’s a useful way of judging case.
So I’d dry it, observe for a while, adjust case if necessary. Then it should be fine.
Those bales of tobacco sold by whole leaf tobacco companies typically sit around a long time—years—before they are divided up and sold. It is aging during that time, usually with minimal mold issues, with nothing added to the tobacco.