Banking Highlights:

Your bank storage space is protected so that only you have access to it. This space cannot be shared with other players. Each character on your account has its own unique bank space, which cannot be shared with your other characters.

You do not store money at the bank; instead, you carry it along with you everywhere you go. Money has no weight and does not take up any inventory slots, so no matter how much youre carrying, it will never have a negative effect on your character.
Horde players can use any Horde bank, and Alliance players can use any Alliance bank, but these factions cannot use each others banks.
Thanks to an advanced network of secure automated teleportation modules (ATMs) *wink,* the items deposited in your bank space at any bank will automatically be available for withdrawal from any of the other banks that you have access to. While the bank transfer screen is up, your items cannot be accidentally dropped on the ground. Expect nothing but smooth and speedy service with a smile (or snarl, for Horde players) at the National Banks of Azeroth.