Void Storage is Loka's magical auto-sorter. To access it, you'll first need to head into storage and find this chest (called a Void Storage Deposit Chest) in the center of the room.
Put all the items you want to store into the chest and then close it. Re-open it and... Ta-da! The items have vanished. Where have they gone? They've been transported into various Void Storage Access Chests throughout our storage. If items you put into the Deposit Chest do not vanish when the chest is closed, then those items are not yet configured to sort. Let a Birdkeeper know if you run into this issue. Now let's head into the Fledgling+ Storage and check out the Access Chests.
Each chest with an item frame on it within this storage is an Access Chest. Access Chests are able to store an infinite amount of specific item types. By shift-clicking one of the item frames, we can see exactly what that specific Access Chest is configured to store.
Clicking on one of these items will take you straight to where that item is inside this magical, infinite chest!