By Bryce / Last Updated August 28, 2023

Can’t I format 128GB USB flash drive stick to FAT32?

“I intend to format my 128GB SanDisk USB flash drive stick into FAT32, thus I can use it in different electronic devices. But there is no FAT32 option in Format window. I have ever formatted a 16GB SD card into FAT32 file system successfully within File Explorer. What happens? How can I change my USB flash drive to FAT32 file system in success? Thanks!”

No FAT32 Option

A USB format tool is helpful!

FAT32 (File Allocation Table 32), used as an extension of FAT16, has great compatibility. It can be supported by PSP, XBOX360 and etc. Usually, you can format a drive into FAT32 in Windows smoothly. However, Windows supports you to format partition not larger than 32GB to FAT32: within File Explorer or Disk Management, FAT32 option doesn’t exist; within Diskpart utility, an error message- the volume is too big for FAT32.

The Volume Is too Big

A free FAT32 USB format tool – AOMEI Partition Assistant Standard can give you help! It is very easy to install and handle. With the help of it, you can format a large partition beyond 32GB, like 64GB, 128GB, or 256GB to FAT32 in Windows 11/10/8/7, XP, or Vista. What’s more, it is able to convert NTFS to FAT32 without data loss and versa vice.

Format 128GB USB into FAT32 within three steps

Now, let’s see how to use AOMEI Partition Assistant Standard to format 128GB USB into FAT32 in Windows 11/10/8/7, XP, or Vista. Firstly, free download, install and run it. Then, do the steps given below:

Download Freeware Win 11/10/8.1/8/7/XP
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Step 1. In the main user interface, right-click the partition on 128GB USB flash drive or SD card and select Format Partition


Step 2. Set the file system of partition to FAT32 and then click OK button. You are allowed to change cluster size or add a partition label as well.

Format Partition


Step 3. You’ll return to the main interface, click Apply and Proceed after confirmation.



▪ Formatting will erase all data on the USB drive, thus you’d better back up necessary files before this operation.
▪ If the USB drive is originally formatted with NTFS file system, you can convert it to FAT32 without formatting.

Wrap things up

When your USB flash drive or SD card is not beyond 32GB, you can choose to format it within Windows File Explorer, Disk Management, or Diskpart utility as you want. But for formatting 128GB USB to FAT32 file system in Windows, AOMEI Partition Assistant Standard is highly recommended.

In fact, it is more than a USB format tool. It enjoys many other powerful features like creating and managing the second partition on a USB flash drive or SD card, adding non-contiguous unallocated space to the partition that you want to extend, and so on. If you upgrade it to Professional Edition, you can experience more advanced functions, including recovering lost partition on external hard drive, converting MBR system disk into GPT and etc.