Hello,
Well, I keep all my films in the fridge. It’s always worked really well so far – the films were still fine even after the stated expiry date!
I haven’t tried a freezer myself yet! But I’ve heard from others that it’s supposed to work too – you just have to take a few precautions to make sure no condensation gets onto the film!
Maybe someone here knows something about it!

Kind regards,
Mirko Haesslich