Installed on any Mac or Windows PC, you assign an access password to a folder on the storage device.

One of the most popular (and free!) utilities is TrueCrypt.

There are several software encryption tools that secure the contents of a USB Flash Drive. The password will be required whenever someone attempts to open the file. Simply assign a password to your files when you save them (see this tutorial). Microsoft Office applications have built-in password protection. Secure the important documents on your USB Flash Drive in one of three ways: 1. However, the technology can also pose a security problem if it is inadvertently misplaced and accessed by another person. Do you have a USB flash drive? What files are stored on it? Would you care if just anyone were to access those files? A USB flash drive is a handy way to carry around electronic documents, many documents with the increasing storage capacities.