How to repair corrupted USB storage and reset to defaults

Whenever I connect my USB key to PC it says “you need to format the disk in drive before you can use it”. When I try to format, it shows the disk capacity as 662MB which is not correct and not the original size of 8GB. Here are steps how to fix your corrupted USB storage key which is not showing correct size or is not readable on some computers.

  1. Open cmd.exe
  2. Type in diskpart
  3. Type list disk
  4. Type select disk x (x = number of the disk with issue 1, 2,3 — depends)
  5. Type clean
  6. Type create partition primary
  7. Type format fs=fat32 quick
  8. Now you can use your USB storage key again as before.

Here is output from my USB key restore:

C:\> diskpart
Microsoft DiskPart version 10.0.10586
Copyright (C) 1999-2013 Microsoft Corporation.
On computer: ROMANK

DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
  Disk 0    Online          238 GB      0 B        *
  Disk 1    Online         7502 MB      0 B

DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
  Disk 0    Online          238 GB      0 B        *
  Disk 1    Online         7502 MB      0 B

DISKPART> select disk 1
Disk 1 is now the selected disk.
DISKPART> clean
DiskPart succeeded in cleaning the disk.
DISKPART> create partition primary 1
DiskPart succeeded in creating the specified partition.
DISKPART> format fs=fat32 quick
  100 percent completed
DiskPart successfully formatted the volume.
DISKPART>

Once the steps successfully completed – your USB storage is back in default and you can use it again as before 🙂