How to Revert / Convert USB Drive into 64GB (Actual Size) From Windows Bootable Image of Size 32GB?



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Reverting a USB drive to its actual size involves removing any partitions, formatting the drive, and potentially restoring its original firmware. If you have a 64GB USB drive that has been modified to appear as a 32GB drive with a Windows bootable image, you can follow these steps to revert it back to its actual size:

Important Note: These steps involve low-level operations on the USB drive, which can result in data loss. Make sure to back up any important data on the USB drive before proceeding 

 Method 1 

 1. Open command prompt. Press Win+R and type CMD and enter
 2. Run diskpart 

Microsoft DiskPart version 6.1.7601
Copyright (C) 1999-2008 Microsoft Corporation.
On computer: FA2-PC

DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
  Disk 0    Online          465 GB  3072 KB        *
  Disk 1    No Media           0 B      0 B
  Disk 2    Online           58 GB      0 B
DISKPART> select disk 2

Disk 2 is now the selected disk.


DiskPart succeeded in cleaning the disk.

DISKPART> create partition primary

DiskPart succeeded in creating the specified partition.

DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
  Disk 0    Online          465 GB  3072 KB        *
  Disk 1    No Media           0 B      0 B
* Disk 2    Online           58 GB      0 B

DISKPART> format fs=ntfs quick

  100 percent completed

DiskPart successfully formatted the volume.


 Method 2 

1. Backup Data: Before proceeding, ensure you have backed up any important data from the USB drive.
2. Delete Partitions: Press Win + X and select "Disk Management." Locate the USB drive in the list of drives. Right-click on each partition on the USB drive and select "Delete Volume" for each partition. Ensure that the entire USB drive is unallocated space. 

3. Restore USB Drive Firmware (Optional): Some tools allow you to restore the original firmware of the USB drive, which might have been modified to appear as a smaller size. However, this step can be risky and may not always work for all drives. Search for a firmware restoration tool specific to your USB drive's brand and model. 

Caution: Firmware modification is advanced and can potentially damage the USB drive if not done correctly. 

4. Format USB Drive: Right-click on the unallocated space on the USB drive and select "New Simple Volume." Follow the wizard to create a new partition and format the USB drive. Make sure to use the full capacity of the drive. 

5. Restore Bootable Image (if needed): If you want to restore a bootable image back to the USB drive, use a tool like Rufus or BalenaEtcher to write the bootable image onto the USB drive. 

6. Verify Size: After the steps above, your USB drive should be back to its original size (64GB).


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