Step 1: Go to Start Type “Run” > Type “CMD”
Then ,Open Command Prompt in the Administrative Mode.
Step 2: there will be a black coloured window that will be opened for you.
Step 3: you have to Type in Command prompt : attrib -h -r -s /s /d <Your USB drive letter>:\*.*(See <Your USB drive letter> from My computer and then type it For ex, if your drive letter is “D” then the command is like: ” attrib -h -r -s /s /d D:\*.* “).