I recently bought a new Toshiba 2TB HDD to upgrade my storage. I was going to move my os to another drive I had to free up some space. Once I cloned the drive, it comes up in File manager as (B:). Windows doesn't recognize it as a bootable drive, even though it is an exact copy of the original drive. I tried to boot to it directly using the BIOS, but that didn't work either. It said it was a "Non-System Disk". How do I convert the drive to a bootable drive (preferably in Windows)?
Windows 10 64- Bit