Ultimate Storage: Designed to hold and transport a total of 20 3.5' HDDs safely without worries. Complete Protection: Built with a rigid ABS and PC specifically-engineered chassis so your hard drives will stay safe all wrapped up in an unobtrusive briefcase design. A Perfect Fit: The EVA sponge/foam interior ensures a snug fit for all your hard drives so they'll stay protected. Everything-proof: Dustproof shockproof waterproof and resistant with a sturdy handle for easy transport. If for any reason you are dissatisfied with your purchase just let us know and we promise to make it right..