This is precisely the good & bad part of everything:
It's incredibly mundane & effortless, i call it "lazy storage".
It was just an odd end of a room, we asked the furniture shop in our neighborhood to place three sliding doors side to side and make some internal divisions so it's just the wall ( brick & mortar ) , internal divisions ( laminated damp-proof pseudo-wood ) and those doors. This "cabinet" is located at the very center of the place, so it's safe from sunlight and keep a nice constant internal temperature.
Not a dedicated room but part of our expanded kitchen ( "open space" you may call it, there's zero issues with odours anyways ), it's as far away from where we cook as possible. Zero contamination inside as well.
It was never intended to store tea inside but as i kept piling had to start moving stuff out. Kept buying tea so it became like some living expanding creature claiming section after section and kicking everything else out... to the point where i need to order a new cabinet... since past june
. I want this done by our usual guy and planned to schedule it for last september but the pandemic made everybody go crazy and upgrade/rebuild their homes... therefore his schedule is full and so we wait... but the situation is becoming hard to handle 
... we have stuff outside that should be properly stored ( including 15kg of natural whole cacao beans ) and had to store some cakes on other cabinets ... take cups & kitchenware out for the time being ( fortunately not affected by any smell, etc... either ) ... not really sure what i'm going to do with my oncoming ( and final... for a while ) three tea orders now.As for the storage itself, it's just piled cakes by type ( sheng - which is the biggest section by far - , shou, white tea cakes, the odd oolong & black tea cakes ) and then tons of bags for loose leaf ( have a whole section for oolongs ) ... which i probably need to store properly ( need to check some decent stackable cans i can buy in bulk ) .
The most advanced components of my storage are... the 6 hygrometers i have spreaded around; 5 are spreaded inside the different sections then i have a bigger on to check the room temp/humidity.
I live on a particular location with a 70%RH all-year average... usually we enjoy some almost tropical weather in summer with some rain, however this past summer has been the driest one within the last two decades. Zero snow all year, the most alarming low temperature last year was 0ºC / 32F in the middle of the night.
Funny enough november started very tropical and we've been enjoying temperatures around 25ºC/77ºF + up to 87%RH ... inside the very room my tea cabinet is in.
I/we open that cabinet daily and check the values; these days it's constantly around 25ºC/77ºF + 70% RH no matter the changes outside; on the worst of winter it's stable at 20ºC/68ºF - 60%RH ( all of these are "inside" values ) .
When we have this kind of high humidity / decent temperature days ( not that it last for weeks ) i usually keep the doors open at night so the tea can breathe all in.
What i've noticed is that you can tell when your tea is happy by smell alone. On winter you just get close enough and smell the amazing aroma emanating from all those cake, but the moment RH hits 70% or higher on 25-30ºC days... each time you open one of those sliding doors you're greeted by the most marvelous symphony of fragances, it's very much like a giant wave made of a mass choir & hundreds of early morning birds singing in different fragances, hard to describe that kind of impact, just changes your mood, makes you feel at peace .
Ah! ... the only one "advanced trick" ... would be placing a few tiny cups with water on those few couple days where RH inside falls below 60% ; doing this alone fixes & stabilize the inner RH a little over 60% .
Mentioned on another post this past weekend that such a convenient storage would makes the sole notion of moving out ( hopefully will never need to do such a thing ) a very stressfull thought to have .
No pics for the time being
... because - as explained - things are a little messy ( in fact, some cakes i'd like to taste are hard to reach... so i give up for the time being ) but will try to share a few ( must confess i rarely take pics of my tea, not to mention uploading 'em anywhere ) once my new cabinet is ready and can finally re-arrange everything as it should be for the next few decades.Funny enough always define myself as somebody deeply pessimistic and it's in fact pessimism that made me go ahead with this 40-years-of-tea project... but in turn... nowadays being convinced i'll be around drinking tea for the next four decades and pay for that in advance is probably one of the most optimistic actions one could take .
