Hi, I recently brought a pendrive. It worked fine for few days but today it has started with some sort of problem. I have transferred an important data to my pen drive from my friend’s laptop. But when I connected the pendrive to my PC and tried viewing it, it showed that the pen drive is full empty. All the files and folders are missing or invisible. But when I checked the properties of the pendrive it showed that the space is being utilized by those files. What could be the problem? How can I get those files back?