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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.  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. 

<code>
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

</code>

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

WELL MAYBE NOT!

You may need to do more to separately delete each of the two partitions on disk 1, including using the "override" parameter to delete any protected partitions, and then clean the entire selected disk again.  Thereafter, if you list partition on the selected disk, there will be none listed.  Try to follow what I did as follows:

<code>
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> list partition

  Partition ###  Type              Size     Offset
  -------------  ----------------  -------  -------
  Partition 1    Reserved            15 MB    24 KB
  Partition 2    Primary             15 TB    16 MB

DISKPART> select partition 2

Partition 2 is now the selected partition.

DISKPART> list partition

  Partition ###  Type              Size     Offset
  -------------  ----------------  -------  -------
  Partition 1    Reserved            15 MB    24 KB
* Partition 2    Primary             15 TB    16 MB

DISKPART> select partition 2

Partition 2 is now the selected partition.

DISKPART> delete partition

DiskPart successfully deleted the selected partition.

DISKPART> select partition 1

Partition 1 is now the selected partition.

DISKPART> list partition

  Partition ###  Type              Size     Offset
  -------------  ----------------  -------  -------
* Partition 1    Reserved            15 MB    24 KB
  Partition 2    Primary             15 TB    16 MB

DISKPART> delete partition

Virtual Disk Service error:
Cannot delete a protected partition without the force protected parameter set.


DISKPART> select partition 1

Partition 1 is now the selected partition.

DISKPART> list partition

  Partition ###  Type              Size     Offset
  -------------  ----------------  -------  -------
* Partition 1    Reserved            15 MB    24 KB
  Partition 2    Primary             15 TB    16 MB

DISKPART> delete partition override

DiskPart successfully deleted the selected partition.

DISKPART> list partition

  Partition ###  Type              Size     Offset
  -------------  ----------------  -------  -------
  Partition 1    Reserved            15 MB    24 KB
  Partition 2    Primary             15 TB    16 MB

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> list partition

There are no partitions on this disk to show.

DISKPART>
</code>