Functional Storage is an alternative take on the storage solution of Storage Drawers with an updated look:

Pulling Upgrade: It pulls items from an adjacent inventory
Pushing Upgrade: It pushes items to an adjacent inventory
Collecting Upgrade: It collects items on the ground
Armory Cabinet: It stores 4096 non stackeable items(by default) and can only be accessed with external tools (currently) like Applied Energistics or Refined Storage external storage tools
Storage Upgrades: Have changed a a bit, there a less types of them but they give a bigger boost
Storage Controller: You can link drawers to it without having direct contact (Range can be extended with upgrades)
Fluid Drawer: Stores Fluids
Controller Access Points: Acts as a Storage Controller when linked to it
Simple Compacting Drawer: Its like a compacting drawer but with only 2 slots

How to use

Drawer controller: To link a drawer to a drawer controller you need to use a **Linking Tool **
Ender Drawer: You can copy a drawer frequency by left clicking it with a Linking Tool and then you can right click another Ender Drawer and then they will have their contents synced
Linking Tool: Right + Clicking a controller to configure it then you can link Normal/Compacting/Ender Drawer to a controller by Right Clicking them if they are in range (8 radius by default)

Data pack tags (1.21+)

functionalstorage:armory_cabinet_insertable: Item tag. Items in this tag are allowed to be inserted into the Armory Cabinet.
functionalstorage:drawer_storage_denylist: Item tag. Items in this tag cannot be stored in drawers, including normal drawers, compacting drawers, controller access, and drawer item capabilities.
functionalstorage:fluid_drawer_storage_denylist: Fluid tag. Fluids in this tag cannot be stored in fluid drawers.
functionalstorage:creative_vending_upgrade_incompatible: Item tag. Items in this tag cannot be used in a drawer storage upgrade slot together with the Creative Vending Upgrade.