In the main town you will find a wooden chest on the ground with two white hand prints on it. This acts as a bank at this time.
Depositing Items: Stand beside the chest – Open your inventory – Select an item – select “Send to Chest”
Withdrawing Items: Stand beside the chest – tap the chest (window opens) – select the items you wish to more to your inventory
Note that some items may not stack when depositing them into the chest but you can manually stack them to save space.