How to Reformat USB Flash Drive

How to Reformat USB Flash Drive

Windows 7

Run Command Prompt as Administrator

Microsoft Windows [Version 6.1.7601]

Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Windows\system32>diskpart

Microsoft DiskPart version 6.1.7601

Copyright (C) 1999-2008 Microsoft Corporation.

On computer: MYCOMPUTER

DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt

  --------  -------------  -------  -------  ---  ---

  Disk 0    Online           74 GB      0 B

  Disk 1    Offline         465 GB      0 B

  Disk 2    Online          465 GB  1024 KB   *

  Disk 3    Online          465 GB      0 B

  Disk 4    Online         3859 MB  2574 MB

  Disk M0   Missing            0 B      0 B   *

  Disk M1   Missing            0 B      0 B   *

DISKPART> select disk 4

Disk 4 is now the selected disk.

DISKPART> clean

DiskPart succeeded in cleaning the disk.

DISKPART> create partition primary

DiskPart succeeded in creating the specified partition.

DISKPART> select partition 1

Partition 1 is now the selected partition.

DISKPART> active

DiskPart marked the current partition as active.

DISKPART> format fs=fat32

  100 percent completed

DiskPart successfully formatted the volume.

DISKPART> assign

DiskPart successfully assigned the drive letter or mount point.

DISKPART> exit

Leaving DiskPart...

C:\Windows\system32>