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Restore USB Drive/Flash Drive/Pen Drive Back to Full Capacity

Updated on Dec 11, 2018 by Daisy to Partition Master

Summary:
Formatting USB flash drive is the best way to restore USB flash drive to full capacity. Try it to reclaim the lost or unallocated space when the USB flash drive is not showing full capacity.

Overview of USB flash drive not showing the full capacity issue:

Sometimes, users may find that their USB flash drive is not showing full capacity. For example, you have a 16 GB USB flash drive, but Windows shows only 3 GB. The same issue can happen to other storage devices like hard drives, pen drive, memory card, Micro SD card, etc. When you happen to come across such a problem, how can you reclaim the lost space and restore USB flash drive back to full capacity or original size? Don’t worry, even you have no reliable solution. After introducing how to restore SD card back to full capacity in the last article, in this page, we will continue to talk about the reasons and fixes for USB flash drive not showing the full capacity issue. 

USB flash drive not showing the full capacity issue

Reasons:

When your USB flash drives are not showing full capacity, you may wonder that how it happens or where is the lost capacity. Actually, there are various reasons such as invisible shadow files, formatting overhead, and hidden recovery partitions, or unallocated space. 

Solutions:

To restore USB drive, pen drive or flash drive back to full capacity, you can use third-party USB format tool to reformat the flash drive. EaseUS Partition Master allows you to format the USB flash drive, hard drives, pen drive, memory card, Micro SD card and recover the lost or unallocated space when disk shows the wrong capacity in Windows. 

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 Windows 10 is supported

Warning
Formatting will erase all the data, please make sure that you have made a backup before trying to restore USB drive, pen drive or flash drive back to full capacity.

To restore USB drive, pen drive or flash drive back to full capacity, follow these steps:

Step 1: Select the USB drive to format.

Connect the USB drive or pen drive to your computer. Download and launch EaseUS partition software. Right-click the USB drive you intend to format and choose "Format".

Format Hard Drive Partition - Step 1

Step 2: Set the drive letter and file system.

Assign a new partition label, file system (NTFS/FAT32/EXT2/EXT3), and cluster size to the selected partition, then click "OK".

Format Hard Drive Partition - Step 2

Step 3: Check the warning box.

Click "OK" if you see the Warning window. If you have important data on it, back up the data in advance.

Format Hard Drive Partition - Step 3

Step 4: Apply the changes.

Execute the operation and click "Apply" to format the USB drive.

Format Hard Drive Partition - Step 4