is a duo-function device designed to serve as a USB and to create a secret chamber embedded within your Local Disk (C) & Local Disk (D). You can move your confidential files to the secret chamber. The files moved to the chamber will be encrypted and will be invisible after you remove your HDD Vaults Maker from your computer. The confidential files existing in the secret chamber can only be seen by inserting your HDD Vaults Maker into the USB port and entering the correct password. (for more information please go to http://ifworlddesignguide.com/entry/170693-mosdan-hdd-vaults-maker )