lock USB flash drive / USB flash drive

The inspiration for the USB flash drive comes from the lock, which we use to keep our privacy and personal belongings safe.
When the friends or the colleages want to borrow the USB flash drive, we will worry about the leakage of the confidential files we stored inside and a refusal may lead to misunderstanding. This device will solve the problem.When it is unlocked, the files stored inside is accessable. The device is used as a normal one. When you lend it to someone, just press the lock and the information inside the device is locked. In other words, the information is invisible to others.