A USB flash drive is lightweight and small in size and can for example be stored in a pocket or in a wallet. You can also store large amounts of data on USB flash drives, in some sticks up to 64 GB, so if you need to transport lots of data, using a USB stick can be very convenient. Security risks USB flash drives are useful, but there are some security risks to consider when carrying a USB flash drive — it can be lost or stolen. This is really of great concern if the drive contains sensitive information, for example financial information, business plans, source code for software, employee data, technical drawings etc. To prevent that the information may end up in the wrong hands there are USB flash drives available that can protect the data that is stored on the drive.
More flash drive firms warn of security flaw; NIST investigates
USB peripherals and USB Devices are around for more than a decade and nothing much has changed when it comes to the basic protocols. People still use it, the reason being, USB storage devices are so minuscule and portable. To deal with this, we can do two things. In simple terms, encryption is an act of transforming data so that no unauthorized person can access, read, or modify the data. This transformation is done by complex algorithms which use passwords or key files.