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Using Windows DiskPart Tool to Reset External USB SSD Drive to Factory

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

Type DiskPart in the text input line and press enter.

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>