Help.. My USB drive's folder always hidden

Hi mate,

 

recently my usb drives (USB stick and External Hardisks) act suspiciouly. Everytime I plug in, all folder inside the drive is hidden. I have to do attrib command to make them unhide. But everytime I unplug and plug it again, it becomes hidden again. 

 

I've tried to scan using norton 360 and malwarebytes but no result. 

 

Please advise