You can access your warehouse through Keeper Daru in town.
There's no storage fee for storing items and Gold, but it costs money to retrieve items.
■ Warehouse Info
- Storage Capacity: 20 slots by default, expandable up to 300 slots with Gems
- Item Retrieval Cost: 1,000 Gold per item type (e.g., 5 types of items cost 5,000 Gold to retrieve.)
- Gold Withdrawal Cost: 1,000 Gold for any amount
※ The expanded warehouse space is applied to all realms (servers).