Partition and Format the External Hard Drive for NTFS
First check if your drive needs to be formatted by checking the current Format\File-System of the drive.
Open "My Computer", right-click the external hard drive you want to use, then select "properties".
Make note of the Drive Letter of the external hard drive as this will be important later.
If the "File-System" is already NTFS, you can skip this step.
If you have anything saved on the hard drive, you should back it up now as all the data will be lost once you format it.
Right-click "My Computer" and select "Manage", a new window will open, on left panel click "Disk Management".
Right-click the drive you want to format (make sure you select the right drive!), then select "Format..."
Select "NTFS" as the File system to use and input a name for the Hard-Drive/Volume.
You may optionally uncheck the "Perform a quick format" box, then click "OK", then click "OK" again.