You can't clone only the drive storage without the OS.
You can sift through all of it, and transfer it somewhere else. (Meaning, go through, and save pictures, videos and whatever else you want to keep, then put them somewhere else, like the cloud.)
Then format the drive, and reupload them there.
You could also just clone the drive entirely, moving your windows install, and all of what you had before to the new main drive, then format the old one, and if you want to, you can then do what i mentioned earlier, and copy all the stuff to the old drive.