1. Go to the Start button on windows,
2. Search for the "cmd" in searching tool,
3. Run the cmd as a Administrator,
4. After the text "C:\Windows\system32>" type "chkdsk x: /f" (without the colons) where x is the drive giving you the statement "You need to format the disk in drive J: before you can use it."
5. Wait for sometime till finish, the time tacken depending on the size of data available in the drive
NoTe: The more the data the more the TIME.
Hope it will help!
For more details follow the link.
