You may use UIDesigner to create and edit a Storage Menu in a few clicks.

The Storage Menu is usually used to exchange items between the player inventory and a storage inventory. It references a pair of Inventory and Inventory Grid for both the player and the storage.

The Inventory Grid is assigned a custom click event that opens a quantity picker panel to choose to amount of item to store and/or retrieve. This means that the Storage Menu is not compatible with Item Actions.

More details can be found on this page.

Important: The Storage Menu is one solution to store items in another Inventory. Feel free to create your custom Storage Menu from scratch or even create storage with just Item Actions and/or drag and drop using Inventory Grids in floating panels.