A few weeks ago, my phone warned that the SD card had corrupted files or other issues and recommended backing it up and replacing it. I stopped using the card immediately, intending to copy everything after returning from a trip, but it became completely undetectable before I could do that. Multiple phones and card readers fail to recognize it, even though the card has no visible physical damage. It is a Kingston 128GB card that is less than a year old and contains important photos and videos. I'm a beginner with data recovery and have seen techniques such as NAND recovery and Spider Boards mentioned. Is recovery still possible when an SD card is not detected at all, and what should I avoid doing to prevent making the situation worse?
3 Answers
Your best chance is to preserve the card exactly as it is and avoid experimenting with NAND tools or improvised adapters. Incorrect pin connections, repeated power cycling, formatting, or attempts to repair the file system can reduce the chances of recovery. Going forward, keep at least one additional copy of important photos on a computer or another storage device, since flash cards can fail without warning even when they are relatively new.
The fact that the card looks physically perfect does not rule out an internal failure. A card can stop responding because its controller or memory has failed, and in that situation normal recovery software will not even see a drive to scan. If it becomes detectable at any point, the first step should be creating a sector-by-sector image rather than browsing or copying files directly. For a completely invisible card, professional equipment is usually needed.
If the card is not detected by any phone or reader, software recovery tools probably cannot access it. The failure may be with the controller or flash translation layer rather than just a corrupted file system. NAND recovery or specialized reader tools can sometimes help, but they require experience and the results are not guaranteed. Since the photos are important, the safest option is to stop testing it and take it to a reputable data-recovery professional. Do not format it, initialize it, run repair commands, or keep repeatedly plugging it in.
That’s disappointing, but I understand. Is there anything safe I can try myself before taking it to a specialist?
I’ll avoid trying random recovery methods and look for a qualified recovery service instead. I had assumed the card’s age and lack of visible damage meant it was probably safe.