Forgive my misunderstanding. I used the computer science definition of vault:
The process of sending data off-site, where it can be protected from hardware failures, theft, and other threats. Several companies now provide Web backup services that will compress, encrypt, and periodically transmit a customer's data to a remote vault. In most cases the vaults will feature auxiliary power supplies, powerful computers, and manned security. Also referred to as a remote backup service (RBS).