Hey Folks!
Jehree updated his original version of this mod. As i said, as soon as he updaes it, i wont continue on this on!
So check the original upload please!

Jehree’s Original Mod

This mod aims to add a balanced way to store all your keys in one grid square, and do so in a convenient way that makes it easy to tell if you have already acquired a key.

To install, place the Gilded Key Storage folder in your user/mods folder.

This mod makes keys have unlimited uses, weightless, and discardable by default. Disable those things in the config if you‘re wrong don’t like them.

This mod adds:

1: Golden Keychain Mk. I, Mk. II, and Mk. III

• Between these three keychains, ALL mechanical keys in the game can be stored. They will not accept duplicate keys, meaning if you have a key and cannot drag it onto any of the three Golden Keychains, you already have that key!

2: Golden Keycard Holder

• Same as the keychains, but can hold all keycards including a total of 9 Labs Access Cards.

3: Secure Key Box

• This is where it all comes together. This box holds all three of the Golden Keychains, and also the Keycard holder. Additionally, it has a 5x5 storage compartment for loose keys. With all 5 cases you can store every key and keycard in the game in a 1x1 grid cell.
• In raid, the process would look something like this: Find a key and drop it into the Secure Key Box. When you have a safe moment, open the Secure Key Box and drag the key over your keychains/ keycard holder to see if there is a free slot available for it. If so, great! Drop it in there, you acquired a new key. If it won’t fit, then you know you already own the key and can either toss it or keep it in the Secure Key Box to sell if it is valuable.
  • example: