Right click on the Windows Button and Left Click on Run.

Type DiskPart in the text input line and press enter. Next to the DISKPART> prompt, enter the following commands. Make sure to select he proper drive # that you want to “CLEAN” (that is, to reset to factory). If you select the wrong disk, like the Disk C:> where the operating system is installed, you will likely DELETE YOUR WINDOWS O/S.

Microsoft DiskPart version 10.0.19041.3636

Copyright (C) Microsoft Corporation.
On computer: DESKTOP-EI33F04

DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
  Disk 0    Online         1863 GB  1024 KB
  Disk 1    Online           15 TB      0 B        *

DISKPART> select disk 1

Disk 1 is now the selected disk.

DISKPART> clean

DiskPart succeeded in cleaning the disk.

DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
  Disk 0    Online         1863 GB  1024 KB
* Disk 1    Online           15 TB    15 TB

DISKPART> Exit

Now you can use Windows Disk Management Snap-in to initialize the disk, partition it, and format it.