Is your Pendrive suddenly showing empty and in properties its saying it has lots of used space and when unhiding folders then all your data showing as hidden files and folders. Then definitely your all data got infected by a virus and also you are unable to change it to visible as the hidden tick box in the properties of files and folder is grayed.
Below i am going to give you solution for this issue. Just do according to it and get rid from hidden data issue.
Temporary solution to access your data :
Screen shot for this solution:
Click on Start –> In search box, type folder options and press Enter.
“Folder Options” will be opened. Click on the “View” tab.
Now select the option ” Show hidden files
Categories: Other Misc