By Bryce / Last Updated October 13, 2019


Scenario 1: “I connect my 16 GB Kingston flash drive to my Windows 10 computer and there are 4GB shows in File Explorer. To figure out why, I opened Disk Management and found that there is an unallocated space behind partition F.

In order to make full use of the space of my flash drive, I right clicked the unallocated space to create the second partition on flash drive; but I found that the option “New Simple Volume…” is grayed out. Then, I right clicked the existing partition and found that the option “Extend Volume…” is grayed out. Is there any one can recommend me a partition tool for USB flash drive to help me to take advantage of the unallocated space behind the first partition? Thanks!”

Scenario 2: “I have a 64GB Samsung USB flash drive that hold one partition to store data and it was formatted with NTFS. Now I need to format 64GB drive to FAT32. I know that Disk Management is a powerful utility to manage disk, so I decided to turn to Disk Management. But I found that FAT32 is not displayed among file system list in Format window. Then my friend told that it is not allowed to format partition over 32GB to FAT32 via Disk Management and I need a USB flash drive partition tool. But I don’t know which to choose? Is there any advice”?

Get a free yet useful partition tool for USB flash drive

Actually, there are various partition tools for USB flash drive that can help you to delete partition, resize partition and format partition on USB flash drive. Here AOMEI Partition Assistant Standard is highly recommended out of the reasons given below:

1. Powerful functions: It can create NTFS/FAT32/ exFAT/ Ext2/Ext3/Ext4 partition, resize partition, split partition and format partition on USB flash drive; it supports create second partition on USB flash drive; it can format large USB flash drive to FAT32 effortlessly. With great technology support, it has been continuously being updated and improved from the published day.

2. Intuitive and concise graphical user interface: user-friendly GUI design of AOMEI partition Assistant Standard makes it is easy to handle even for users who knows little about computer knowledge.

3. Small size of installation package: the file size of AOMEI Partition Assistant Standard is very small; therefore it will not take too much space of your local disk.

4. High compatibility: It is not only can work with Samsung USB flash drive, but also with SanDisk flash drive, Kingston flash drive and so on.

Detailed steps to partition flash drive in Windows 7/8/10

Preparation work that you should make before partitioning USB flash drive:

  • Check whether your USB flash drive is clean. If it is covered with dusts, there are chances that the USB flash drive won’t be detected due to poor contact. If is clean, plug your USB flash drive into a working computer running Windows.

  • It is advised to backup important data on the USB flash drive to avoid data loss caused by inappropriate operation.

  • Free download this professional and reliable free USB flash drive partition tool – AOEM Partition Assistant Standard

Resize partition on USB flash drive

When you need to resize USB flash drive partition, follow the steps given below:

Step 1. Install and fire up AOMEI Partition Assistant. In the main interface, all storage devices will be listed. Locate the USB flash drive, right click the partition on it and choose “Resize Partition”.

Resize Partition SD Card

Step 2. In this pop-up window, extend the existing partition by dragging slider bar rightwards. Then, click on “OK” button.

Extend Partition SD Card

Step 3. Confirm pending operation and click “Apply”>“Proceed” to execute it.

Apply Extend Partition SD Card

PS.: It is also available to create second partition with the unallocated space behind existing partition on flash drive or SD card via this software.

Format Partition on USB flash drive

The detailed steps to format partition are presented as follows:

Step 1. Run AOMEI Partition Assistant. In the main interface, right click the partition on the USB flash drive and choose “Format Partition”.

Format Partition 64GB

Step 2. In this small window, choose one among listed file system and click “OK”. During this process, it is available to change “Cluster Size” or add “Partition Label”.

Select File System 64GB

Step 3. You’ll return to the main interface. click“Apply”>“Proceed” to perform pending operation.

Apply Proeed 64GB


Whether you want to resize partition on USB flash drive or format partition over 32GB to FAT32, this great USB flash drive partition tool – AOMEI Partition Assistant can be your nice choice. It can also help you to partition SD card successfully.

What’s more, it is featured with many other helpful functions. For instance, it is able to change file system between NTFS and FAT32 without data loss; it can also help you to convert MRR disk into GPT. But for system disk conversion from MBR to GPT, you can upgrade it to Professional version.