#Change cid sd card windows how to#
#Change cid sd card windows serial number#

The equipment can ready 20 cards at a time, 40 cards at a time, or 60 cards at a time, depending on the model. With the secure digital duplicators part of their feature set includes reading CID numbers from SD media. Several models they carry are SD duplicators and microSD duplicators. In my search to read the CID number from SD media, I cam across Nexcopy – a manufacturer of USB duplicator equipment and other flash memory equipment. In addition, what if you are required to read the CID number off SD media in bulk? A single, one-at-a-time solution is not practical.

#Change cid sd card windows serial number#

Meaning most times the CID number generated is actually the serial number of the card reader itself, not the CID number of a specific SD card.

There is clear evidence that using a USB to SD card reader will not get you the information you require, or at least accurate and correct information. If you do enough searching on the internet you’ll find some home-brew code to read the CID numbers, but that’s only if you have the SD card or microSD card connected via an IDE bus to your host computer. So with all this said, how do you read the CID number from an SD card? As we’ve mentioned it isn’t easy and it’s hardware based. Below is a table outlining all the items which make up the SD CID number. The CID number is a compilation of information about the card, such as manufacturer, date manufactured, checksum total, GB size and more. It is programmed during card manufacturing and cannot be changed by SD Card hosts. The CID register is 16 bytes long and contains a unique card identification number.

#Change cid sd card windows how to#

It requires specific access codes to the index table of the memory card, and unless you know how to use the SD chipset of your card reader, chances are you wont get the number…or least the correct and accurate number. Reading the CID number from an SD card is not an easy task.

The CID number is valuable because software developers and hardware developers can lock software to the unique number of the device thus eliminating the ability to pass along licensed software. The CID number is a unique card identifier number that is unique to the card itself. Most phones and much of the software on phones will lock in to the CID number of a SD card. UPDATE (Feb 16, 2023): We learned the company which manufactures this product now offers the ability to write the CID value as well as write protect the Secure Digital media. Some also call this “reading the PSN off the SD card” or reading the product serial number off the SD card. If you are looking to read the CID number of an SD card, or extract the CID off an SD card then you’ve find this article very helpful.