By Emily / Last Updated March 4, 2022

What is (SD card) serial number?

A serial number is an identifying code assigned to the hardware during the creation of a file system for unique identification and licensing. Besides the SD card, other electronic data storage devices such as USB flash drive, memory cards, hard disk drive also have such a number.

The serial number does not need to be strictly numerical. Instead, it is determined by the data and time on the real-time clock on the current computer at the time when you format the hard drive. So they may contain letters and other typographical symbols, or may consist entirely of a character string.

The function of the SD card serial number is similar to the fingerprint of persons: identify a specific item. To check or read the serial number on your storage device, you can execute the command: dir [driveletter:] in the Command Prompt window.

Check Serial Number


Why need to change SD card serial number?

Why do we need to modify the SD card or other hard drives serial number? We can find some clues from the functions of the serial number. The disk serial number is used by software applications to identify the drive and prevent multiple activations of the same software on another computer. So, if you plan to replace your old SD card with a new one, a different serial number will be created with software association. Thus, you can change the SD serial number to match your old one’s, then the software association issue can be avoided effectively.

How to change SD card serial number in Windows 10/8/7?

As mentioned above, the disk serial number is automatically generated and assigned when you format the partition, so you can format it again to change the serial number of the SD card. After you format the SD card, you can retype the command to check whether the serial number is changed or not.

Note: Formatting the hard drive will delete all data from it, so please backup important files beforehand.

Serial Number Changed

>>To change SD card serial number without formatting

If you don’t want to edit or modify serial number by formatting, you can turn to a third-party tool like AOMEI Partition Assistant Professional. It can directly change the SD card serial number without formatting it again. So the data security is enhanced. Below is how to edit serial number step by step.

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Step 1. Install and launch AOMEI Partition Assistant Professional. Right click the SD card partition, and click “Advanced” and then “Change Serial Number”.

Change Serial Number

Step 2. In the pop-out window, you can edit a new serial number such as 123456.

New Serial Number

Step 3. Back to the main interface, click “Apply” to commit the pending operation.


The same steps can also be applied to change Samsung micro SD card serial number and other brands of SD card and hard drives. To change the SD card or other storage devices serial number in Windows Server 2019/2016/2012/2008/2003, you can try AOMEI Partition Assistant Server.


As you see above, AOMEI Partition Assistant Professional is a great serial number editor to change SD card serial number safely without damaging stored data. Additionally, it is compatible with Windows 10/8/7 and Windows XP/Vista (both 32-bit and 64-bit).

Moreover, it comes with many other fantastic functions to help manage disk partition conveniently in Windows PC, such as copying SD card to SD card, formatting large SD card to FAT32, erasing SD card completely and so on.