From MyMetaverse

How to Use Your Backpack/Vault

  • Press E to open up your main menu.
  • Then, left click on the Backpack.
  • Alternatively, you can also type /backpack into the chat.
  • Once your menu is open you can drag an item from your inventory into the vault slots above.
  • Any item that you store in your vault slot is safe and you cannot lose them.
  • The backpack menu can be closed out with escape.