Perhaps you might shock to see many weird filenames with executable file extensions such as "*.pif", "*.cmd", "*.exe", "*.com", "*.bat" inside your connected drive, my advise is do not click these unknown files and avoid to run them, because they might be danger virus program.
If you look carefully and view all hidden files inside that drive, you might see there has one filenamed as "autorun.inf", i believe that should be a script which injected by virus to invoke the system to create the mentioned executable files every time when user browsing or connecting to the drive.
You can remove the mentioned suspecious files manually from your drive. To prevent it occurs again, you may create a new FOLDER and name it as "autorun.inf", the reason is the system will not allow to create any file with the same name.
However for further safeguard the system, you should scan your drive with stronger and upgraded antivirus tools.
