A method, data storage device and computer program product for having multiple users share a single data storage device securely. A data storage device, such as a Universal Serial Bus (USB) key, is plugged into a computing device. A USB controller of the USB key recognizes the computing device and creates an account for the user. The created account is associated with the user as well as associated with the computing device. Data uploaded to the USB key by the user is then associated with the created account. Only that user will be able to view that data on his/her computing device (computing device associated with the created account) unless the user indicates to share that data with other users. Such a process may be repeated each time the USB key is plugged into a different computing device thereby creating multiple accounts associated with multiple computing devices and users.