How to Fix Your USB Pen Drive when it's Showing Less GB Disk Space

Fix USB Pen Drive is Showing Less GB Disk Space

Is your USB flash drive suddenly showing less GB in disk space than actual?

Did your 16GB or 8GB USB pen drive became 3GB, 0.99GB, 64MB, 30MB, or 4MB?

Is your USB pen drive showing unallocated space?

Then you are on the right page, because this tutorial will show you step by step how to fix these problems without using any special software, but by using two tools that are built-in Windows XP, Vista, 7, 8 ,8.1 and 10.

This tutorial will work for all USB pen drive brands such as Kingston, SanDisk, Toshiba, Lexar, HP, PNY, Transcend, Freecom, and all other brands.

Restore USB Flash Disk Back to Full Capacity

Important! Copy all data (documents, pictures, videos, music, etc...) from the USB flash drive to another USB pen drive or hard drive, because all data will be erased.

Warning! Diskpart is a very powerful tool. You need to be 1000% sure that you select the right disk, because if you delete the partition on the wrong disk you might delete the Windows partition or another important partition.

Warning! Disk Management is a very powerful tool. You need to be 1000% sure that you select the right disk, because if you change, format, or delete the partition on the wrong disk you might delete the Windows partition or another important partition.

1. Open Windows Command Prompt.

Three ways to open Command Prompt:

2. Type the following command and press Enter:

diskpart
Open Diskpart

3. Type the following command and press Enter:

list disk
List Disk Diskpart Command

4. Now you will see a list with all the drives of your computer and the USB drive that's connected to your computer. Take a good look and make sure you know exactly which one is your USB pen drive. In the example on this page is "Disk 1" my USB flash drive, but this doesn't mean that "Disk 1" is also your USB thumb drive.

5. Type the following command and press Enter:

select disk X

(replace X with the disk number of your USB drive)

Select Disk Diskpart Command

6. Type the following command and press Enter:

list partition

7. Now you will see the partition(s) on the selected drive. Type the following command and press Enter:

select partition X

(replace X with the partition number you want to select)

Select Partition Diskpart Command

8. Type the following command and press Enter:

delete partition
Delete Partition Diskpart Command

If you get the message: "Diskpart successfully deleted the selected partition.", then continue with the following steps.

But:

If you get the message: "Cannot delete a protected partition without the force protected parameter set", then visit this page from HowToGeek (link opens in a new tab/window).

9. To close DISKPART, type the following command and press Enter:

exit

10. To close the Windows Command Prompt, type the following command and press Enter:

exit

11. Open Windows "Disk Management".

Four ways to open "Disk Management":

12. Locate your drive.

Usually it's easy to locate, because it will be shown as "Removable" with unallocated disk space.

13. Right-click on your USB drive and choose "New Simple Volume...".

Create New Volume in Windows Disk Management

14. When the "New Simple Volume Wizard" appears, click "Next".

15. Check if the maximum disk size is selected and click on "Next".

Disk Management Check Maximum Disk Space

16. Select a drive letter (optional) and click on "Next".

17. Make sure "FAT32" is selected as "File system".

18. Go to "Volume label" and enter a label name.

Disk Management Format Options

19. Click on "Next".

20. Click on "Finish".

Windows will create the new volume. That's it.