Use diskpart to clean the disk and format it.
Open Command Prompt as administrator.
Type diskpart and hit the Enter key.
Type list disk and hit the Enter key (pay attention to the disk number).
Type select disk # and hit the Enter key (replace # by the disk number). Make sure to select the disk you want to format, otherwise you will end up wiping out the wrong disk.
Type clean and hit the Enter key (this command will wipe out the drive).
Type lexit and hit the Enter key
You could use Disk Manager to create and format partitions on the disk.