How To Read CID on SD card
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Go to My Computer, click Devices with Removable Storage right click SD card or USB drive and choose Properties choose to Remove write-protection. Option 3: Connect SD card or USB drive with PC, click Start. Type regedit in the search bar and click it. The App show you CID numbers of all installed storage devices. @Android 7+ Users: CID File read access is restricted by many devices. @DownVoters: This App is free and written in hope to help users. I can't test it on all possible devices! If it don't works on your device and you are one from hundreds, maybe it's manufacturer dependent.
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. Some also call this “reading the PSN off the SD card” or reading the product serial number off the SD card.
Most phones and much of the software on phones will lock in to the CID number of a SD card. The CID number is a unique card identifier number that is unique to the card itself. 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.
Reading the CID number from an SD card is not an easy task. 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.
What is the CID number of an SD card?
The CID register is 16 bytes long and contains a unique card identification number. It is programmed during card manufacturing and cannot be changed by SD Card hosts. The CID number is a compilation of information about the card, such as manufacturer, date manufactured, checksum total, GB size and more. Below is a table outlining all the items which make up the SD CID number.
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 [more or less] hardware based. 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. This isn’t easy for everyone. 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. 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.
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.
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. Several models they carry are SD duplicators and microSD duplicators. With the secure digital duplicators part of their feature set includes reading CID numbers from SD media. The equipment can ready 20 cards at a time, 40 cards at a time, or 60 cards at a time, depending on the model. The duplicators will read the CID number and exported to a .csv file for import into other business functions. This configuration makes it quick and easy to obtain the CID number. Granted, the equipment is not designed for single use operation, but rather reading the CID of SD media in bulk quantity. Here is a screenshot of Nexcopy’s software reading 20 CID numbers:
I didn’t contact Nexcopy Incorporated for pricing of the equipment, but doing a quick search for the equipment shows me a price of about $1k for the smallest 20 target system and $3k for the largest, 60 target system.
With all this said, there is still no clear-cut method to read CID numbers off SD cards for the home-user, but maybe this article will at least explain why you haven’t found a good solution as of yet.
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Tags: microsd, nexcopy, read cid, sd card
Rich Gates
larry...@hotmail.com says...
> I'll be receiving a GPS programs and maps on an SD card soon and would
> like to clone the card for backup. The software is locked to the
> serial number of the SD card, so just backing up the data isn't
> enough. I suspect it is impossible to clone the card completely,
Sd Card Cid Register
> including serial number, ..............[snip]
Larry, you did specify the serial number shown for the SD card in
consideration, but wonder if you were speaking of the VOLUME No.
This will appear as a binary pair looking like this:
Sd Card Cid Rewriter
0a33:fa15 (fictitious, of course) This is called the volume no.
or Volume Serial Number. (VSN) Understand we are not talking about
the drive Label name. That is different.
There are several proggies that will enable a user to recode any
particular drive, SD card, thumbdrive, etc. using any combination
of valid binary digits like the above. I always delighted in
re-volume-setting my various SD cards with C0DE:FEED (That 0 is zero)
How To Change Cid On Sd Card
Look for a DOS program called SETVOLNO.EXE, 1992 Micrological Designs