A few weeks ago, my phone warned that the SD card had corrupted files and recommended backing it up and replacing it. I stopped using the card immediately, but before I could copy the data after returning from a trip, it stopped being detected entirely. Multiple phones and card readers fail to recognize it, even though the 128GB Kingston card is less than a year old and has no visible physical damage. It contains important photos and videos, and I'm a complete beginner at data recovery. Is recovery still possible when a card is completely undetectable, and what should I avoid doing to prevent making the situation worse? I've heard of techniques involving NAND recovery and Spider Boards, but I don't know whether they apply here.
3 Answers
The lack of visible damage doesn’t rule out an internal controller or flash-memory failure. Consumer recovery programs generally can’t help with a card that the device doesn’t recognize at all, and experimenting with low-level tools could reduce the chance of recovery. For valuable photos, preserve the card as-is and get an evaluation from a reputable data-recovery specialist.
There may not be a safe at-home fix once the card has completely disappeared from every reader. After recovery, keep multiple copies of important files on separate storage instead of relying on one SD card, even if it’s relatively new.
If the card is not detected by any phone or reader, the recovery odds are unfortunately lower than they would be for a card that still appears with the wrong capacity or filesystem error. Since the photos matter, stop testing it and don’t format, initialize, repair, or repeatedly reconnect it. A professional recovery lab is the safest option; NAND or Spider Board work is specialized and not a good beginner project. If the card becomes detectable again, the first step should be making a full image of it rather than browsing or copying files directly.
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