Unable to see files and folders in pen drive

Recently, I went to Cyber café to scan a document. When I came back, I noticed the folders and files in my pen drive became invisible. Then, I followed the steps shown below to retrieve my files and folders:

Plug the USB to your CPU or laptop.

Step 1:

If you did not format your USB, check whether folders are hidden. In browser, go to 'Tools' -> Folder Options.. -> ‘View’ tab -> Advanced Settings -> Files and Folders -> Hidden files and folders -> Check the radio button ‘Show hidden files and folders’

Step 2:

Go to Start -> Run -> type ‘cmd’ and click ‘OK’. A command prompt will pop up. If the pen drive is G:\ drive, type the following command as shown below:

attrib -h -r -s /s /d g:\*.*

Now, you can see your files and folders back in your pen drive.