Data Recovery Case File · Cameras, Drones & Cards · Older Cards, Different Interface
A Compact Card Presents Itself as a Disc, Which Changes How It Is Reached
His enquiry has a tight timeline and a familiar trap. Pictures taken at his daughter's graduation on a card that "won't be recognised in camera or by computer using a card reader" and "was working fine yesterday" — with the computer asking to format it, which he has sensibly not done. The one-day gap is the useful detail, and the card format he is using behaves differently from the ones most enquiries involve.
| Media | Compact memory card of the earlier professional format — not enumerating in the originating camera or through a reader; host prompting for formatting; recent photographic content held |
| Reported situation | Photographs taken at a family event · card functioning normally the previous day · card not recognised in the camera · card not recognised through a reader · host prompting for the card to be formatted · prompt declined by the owner · indicative cost and fee policy queried |
| Fault class | Card not presenting to host or camera — controller or contact failure indicated; content written and unmodified since |
| Equipment used | Card interface behaviour assessed against its format rather than treated as generic flash media · contact pins examined under magnification for bending and contamination · card addressed as a storage device on controlled equipment rather than through a consumer reader · memory read past the controller where the card did not present · translation layer reconstructed and images validated by opening |
The decode: what this card format does differently, and what the timeline gives him
How this card format differs from the ones in most enquiries: it presents as a disc. Cards of this type identify themselves to the host as a storage device with a full command set, rather than as simple removable media.
Why that matters practically: more can go wrong at the interface and more can be done about it. The card can be addressed with the same commands used for drives, which gives equipment more ways to reach a card that will not present normally.
Why the physical design matters too: the contacts are pins rather than pads. These cards use a socket of many small holes, and a bent pin in the camera or reader prevents connection without damaging the card at all.
Why that is worth checking before anything else: it is not the card. A bent pin in one device explains a card failing there, though not in two separate devices.
What his testing in two devices establishes: the fault travels with the card. Failing in both the camera and a reader removes both from consideration.
Now the timeline, which is the strongest thing he has: nothing has happened since. The card was filled at the event and has not been written to in the day since.
Why the format prompt appears and what it means: the host could reach the card and not interpret it. A prompt to format means a device responded and its volume descriptor could not be read.
Why declining it was the important decision: formatting writes. It creates a fresh empty filesystem over the descriptor that would identify where the photographs begin.
Why the prompt is nonetheless a hopeful sign here: something answered. A card that produces a format prompt is being detected, which is better than one that produces nothing.
On his question about fees, plainly: assessment is free and the figure is fixed in writing. Where nothing is recovered on a card of this kind, nothing is charged.
On the bench
Card interface behaviour was assessed against its format rather than treated as generic flash media — cards of this type identifying to a host as storage devices with a full command set rather than as simple removable media, which permits equipment to address them with drive commands. Their pin-and-socket contacts mean a bent pin in one device prevents connection without card damage, though failure in two devices places the fault with the card. Memory was read past the controller.
The outcome
Interface behaviour assessed against the card format, contacts examined under magnification, and memory read past the controller. Free assessment, one fixed written figure including VAT; where nothing is recovered, nothing is charged. The decode: declining the format prompt was the decision that mattered. It appears when a device answered and its descriptor could not be read — so something is responding, and formatting would write over exactly what locates your photographs.
A card that stopped between one day and the next
Decline the format prompt however many times it appears, and stop reinserting the card. Take some reassurance from the prompt, though: it means a device answered and only its descriptor couldn't be read, which is better than nothing responding at all. The short timeline is your strongest asset — the card was filled at the event and nothing has been written to it since, so whatever is stored is complete. Check for bent pins in the camera and reader before blaming the card.
Refuse the format — call Cambridge Data Recovery on 01223 655015; interface assessed against the card format, contacts checked under magnification, memory read past the controller where needed.
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Our case files are drawn from genuine enquiries received by our laboratory over the past ten years, anonymised to protect client confidentiality. Each one describes the diagnostic and recovery procedure our engineers apply to that fault, using the equipment listed.