I actually store all of my filament (that isn’t loaded into my AMSes) in a large antique wooden steamer trunk (like a pirate chest). It’s massive, and can hold dozens and dozens of spools. Wood is breathable and absorbs moisture, but also allows it to evaporate out into the room (whereas plastic bins trap it inside). I keep a bunch of dessicant inside, and I’ve never had a problem with filament humidity. The filaments I commonly use are always loaded up in my 4 Bambu AMSes. In there, I have extra dessicant pods with reusable dessicant beads.

I’ve got a bin for my specialty filaments but multiple bins were a pain in the back that became hard for me to inventory. At the moment most of my spools are bagged with printed silica container that fits in the center hole using this and this (and this for filling). Those are all sitting on a set of cheap shelves. Its a mild improvement.

What I’m thinking about moving to is something more like this but with the spools bagged. I happen to have a shallow closet in my garage, next to my printer, and I think it’ll work well.

My dream is to keep them in a hardwood humidor cabinet modified to dry.

Build a filament dehumidifier