Seeds store best in a cool dry space as close to frozen as possible. Unless you have air temperature in that range year round or you have naturally dry air, or you use your seeds up quickly, it is probably better to just put the seeds in envelopes and put each category however you choose by alphabet or class i.e. cucurbits, herbs, tomatoes, etc. Put the envelopes of each class like different varieties of tomatoes in order in the bag,seal and rubber band it. Put all of the envelopes in a plastic bin or a bigger zip loc and put it in the refrigerator or freezer.
I like the film case idea, they are hard to come by now. I use old medication bottles with the adult resistant caps only a child can open. They can still be bound by rubber bands. You could put them in a bin in the frig. I used to use my crisper bin for that, but I have way too many seeds now. Now I have several bags in big plastic bag that takes up a whole shelf in my refrigerator. Soon I will probably need a seed frig.