By AOMEI / Last Updated May 25, 2020

Introduction of exFAT

exFAT (Extended File Allocation Table) is a relative new file system that was first introduced to us in 2006. The most outstanding feature of this system is that it makes up for the limit of FAT32, maximum file 4GB in size. That is to say, you can store the single file larger than 4GB on a partition with exFAT file system. Besides, exFAT works well with large-sized partition up to 8TB in size. exFAT eliminates the limitations and disadvantages of FAT16/32 and is suitable for use on various removable memory cards and USB flash drives.

Why you need to format SanDisk USB to exFAT?

If you purchased a new SanDisk USB with FAT32 file system, and want to copy a single file larger than 4GB to it. Windows may notice you that “File is too large for destination file system”. However, exFAT can broke the limitation of 4GB for a single file. So, you’d better format your USB drive to exFAT to broke the limitation of 4GB for Windows 10/8/7 or Mac. Compare with FAT32, exFAT has faster transfer speed and it keeps the high compatibility with many operating systems and devices. So, format SanDisk USB to exFAT in Windows/Mac can be your best choice.

How to format SanDisk USB to exFAT in Windows 10/8/7?

How to format SanDisk USB to exFAT in Windows? Here provides you two methods to do this operation.

Method 1. Format SanDisk USB to exFAT in Windows by Diskpart.

First, connect your USB drive to your computer and make sure it can be detected.

1. Run diskpart as administrator.

2. Type: list disk.

3. Type: select disk n (where n is the number of your USB drive).

4. Type: list partition.

5. Type: select partition # (where # is the number of the partition on flash drive).

6. Type: format fs=exfat.

7. Type: exit.

Format USB to exFAT

However, sometimes you may find Windows was unable to complete the format on USB flash drive, or Command Prompt takes too long in formatting your removable device to exFAT, or you just cannot format USB to exFAT. In this case, you can turn to a third party SanDisk format utility.

Method 2. Format SanDisk USB to exFAT in Windows by best USB format tool.

AOMEI Partition Assistant is a free USB format tool which provides you many powerful functions. You can use it to format USB flash drive, USB hard drive, Samsung USB, HP USB, pen drive as well as SD card. It supports Windows10/8/8.1/7, as well as Windows Vista and Windows XP. The following example shows you how to format SanDisk USB to exFAT in Windows 7. Let’s see the specific steps:

First of all, connect your USB drive to your computer and make sure it can be detected.

Step 1. Download, install and run AOMEI Partition Assistant. Right click the partition on your USB Drive and select “Format Partition”.

Format Partition

Step 2. In the pop-up window, choose “exFAT” from drop-down menu next to “File System”. You also can specify “Cluster Size” under file system if you need to.

Choose File System

Step 3. Next, it will go back to the main interface. Preview the virtual result and click “Apply”>”Proceed” after your confirmation.

Apply Proceed

* If your USB drive shows up as Unallocated space, you can right click it and select “Create Partition”. In this way, you can directly create a exFAT partition.


Follow these simple steps, you can easily and effectively format SanDisk USB to exFAT. AOMEI Partition Assistant can be the best USB format tool. Besides format/create partition, it also has many other powerful functions like resize/move/delete partition, wipe hard drive, convert to NTFS, disk copy, rebuild MBR and so on. If you need to migrate OS from MBR disk to GPT SSD or HDD, you can upgradeit to AOMEI Partition Assistant Pro.