With the new standards of data transmission interface and new types of the electrical connectors being introduced, the need for adding these new electrical connectors to the conventional portable data storage device increases. With more than one electrical connector, a conventional portable data storage device could be connected to the electronics devices with different kinds of electrical connectors and transfer data with the connected electronics devices. For instance, a conventional portable data storage device may have a USB connector to connect to a computer and a Lightning connector that is introduced by Apple Inc. to connect to an Apple mobile device.

In order to use the conventional portable data storage device with protective caps, a user has to remove the protective cap before using it and put the protective cap back onto the housing after using it. If the protective cap is not properly stored when being removed and gets lost, it would increase the chance of damaging the electrical connector.

The present invention provides a method of double rotatable protective swivels on a portable data storage device to protect the electrical connectors and mitigate or obviate the aforementioned problems.