Those storage bags you attach to the vacuum cleaner would remove the environmental factors of where they are stored. If bundle them together, in stacks, with elastic bands it will help you to keep them in nice shape that will minimize air pockets in the bags.
This would seem counter-intuitive to the notion of not putting undue pressure on the disks and the vacuum squishes the disks against each other. In particular 5.25 floppies while 3.5 micros might do better.
I have been storing mine in sealing, air-tight storage bins with big desiccant packs. I suppose I will find out how well this works in time
