ISP-Level Commands: The Hidden Barrier to SD Card CID Reading and Writing
Every few months, it happens.
Someone walks into the IT department holding a microSD card and asks a perfectly reasonable question: “Can we just change the CID on this?”
The IT guy looks at the card. Then at the person. Then takes a slow breath.
It’s not that the question is wrong. It’s just built on an assumption that doesn’t match how the hardware actually works.
