Store your stuff in a climate and humidity controlled environment. Storing outdoors only sheltered from rain isn't good. Extreme hot/cold cycles leads to cracked solder joints. Excess humidity oxidizes solder and rusts metal.

Sometimes you don't have much choice. My main advice is to store in a low humidity environment.

Secondary advice, an environment sealed from pests or rodents.

Tertiary advice, an environment away from the sun and heat.

I'd say store it in an environment in that you would be pleased to live as well. Sheds, barns, and the like are not suitable for storing computer hardware.

Store it in a place equivalent to where you live. If you have a well insulated garage or attic, that's probably fine, if you ask me, but it really depends on where you live.

Store them like you would a gun.
No, seriously.
Don't put them in a place that gets too hot, or too humid, or has rapid temperature shifts that could cause condensation.
Also, consider gun storage bags like these:
https://www.amazon.com/ShieldPro-SafeCache-Gu … t/dp/B00EV3VTRA

They have desiccants and oxygen absorbents, and they work great for keeping rust conditions away.
Just put it in an anti-static bag, then in one of these and keep it in a cool, dry place and they should last a while.

Oh, also, remove any batteries if you intend on long-term storage.

DNSDies wrote:

Store them like you would a gun.

Bit extreme, I wouldn't trust my kids messing round with my pc's 😉

As everyone has said if you can control the extremes then great.
I've got a bit too much to do that. For hardware I thinks valuable or fragile I keep in a container in my house, not ideal but at least in anti static bags i get from work.

For hardware I simply don't have the space for like old servers, things that aren't as fragile like cases or hardware that's easily replaced it goes to storage I cant do anything about the temperature but I do add some of those Silica gel packets you get with shoes and things to try and help with the moisture.

store them in a temperature controlled high security room

oeuvre wrote:

store them in a temperature controlled high security room

I the Antertic surrounded by 2000 armed guards.