I hooked up a hard drive to my computer to format it, did that, turned my computer off, unplugged the hard drive, and when I came back to file explorer, that drive was still there. I checked in disk manager and yes, it's there. I tried ejecting the drive, and deleting the volume in disk manager, but both say some application is using the hard drive (the not plugged in hard drive). I just want it gone. Thanks for any help.