To delete the external hard disk partitions, follow the guideline given below. Remove the partitions from the external hard drive using Disk Management or a partition manager.Check to ascertain that your external hard drive has enough storage, larger than your system partition.Delete existing partitions from your external hard drive.
Skip this step if you already have a Windows installation file.Download Windows 10 installer ISO image to prepare your Windows installation image.This is intended for use in external hard drives and USB sticks.
Back up your data found in the hard drive.Connect the hard drive through the USB port of your PC.