Data Recovery Case File · Cameras, Drones & Cards · The Update and the Card

Fine last night, corrupt after the update: the timeline that names its own cause — the format prompt refused, the filesystem rebuilt, and a thousand photographs recovered from an untouched card

Her enquiry did the diagnostic work in a single clean timeline. Her phone "isn't recognising the microSD card any more — a notification says the card is corrupted and invites me to format it. I haven't formatted it, as I have valuable photos on it." Her priorities, sensibly sorted: "there's music too, but I don't care about it — I have a backup. I'm only interested in the photos — about a thousand of them." And the sentence that identifies the culprit: "the phone and card are both 18 months old, and everything was working perfectly fine yesterday evening. The only thing I did was run the phone software update." That is a textbook cause-and-effect: working perfectly, one change made, broken immediately after. The decode below confirms what her timeline already shows — a system update corrupted the card's filesystem — explains why that leaves the card and its thousand photos almost certainly intact underneath, and credits the decision that protected them: refusing the format.

The decode: how an update corrupts a card, and why the photos survive it

The timeline names the cause: her account is the cleanest kind of diagnosis — perfect before, one variable changed, broken after. A phone software update is a substantial operation that touches storage: it may remount cards, change how the filesystem is handled, interrupt access at an awkward moment, or (occasionally) ship a bug affecting external storage. Any of these can leave the card's filesystem — its index and bookkeeping — in a state the phone then can't read, prompting the "corrupted, please format" notification. The update didn't damage her photos; it damaged the catalogue that lets the phone find them, which is a very different and far more recoverable thing.

Why the card and its thousand photos are almost certainly fine: filesystem corruption is damage to the description of the data, not the data itself. The photograph files sit in the card's memory exactly where they were the night before; what broke is the structure pointing to them. This is why the card typically isn't physically failed at all (hers is only 18 months old, with no incident), and why recovery odds are high: rebuild the filesystem, and the photos are simply there. Her card is a victim of a software event, not a worn-out or broken device.

The format prompt, correctly refused: her instinct to decline was the whole game. "Corrupted, please format" offers the one action that would turn a recoverable situation into a real loss — writing a fresh empty filesystem over the very structures (and risking the data) she wants back. Formatting is what the phone suggests because a blank card is usable again; it is precisely what an owner with valuable photos must not do. She refused, kept the card untouched, and thereby preserved the thousand photographs for straightforward recovery. Her clear priority sorting — photos essential, music already safe — focused the job cleanly.

The recovery: the catalogue rebuilt, the photos returned

The card was imaged write-blocked — the untouched original preserved exactly — and on the image the corruption resolved as the timeline predicted: filesystem structures damaged around the update, the photograph data beneath fully intact. The structures were reconstructed on the copy, the volume stood up, and the photographs were recovered and verified by opening. The music was left aside per her instruction, since her backup already held it — the recovery aimed entirely at the thousand images she cared about.

On the bench

The untouched card — her format refusal had kept it pristine — was imaged behind the DeepSpar USB Stabilizer 10Gb and the update-torn filesystem rebuilt on the copy: the allocation structures the upgrade had left half-amended restored to consistency, the volume standing up with its albums intact. OSForensics verified the photograph estate by opening — roughly the thousand she'd estimated — while the music was deliberately left unextracted, exactly as her backup-aware scoping instructed. The card itself, structures repaired, tested sound: a software casualty, not a hardware one, precisely as the timeline had said.

The outcome

Roughly a thousand photographs recovered and delivered on new media — her timeline's diagnosis confirmed, her refusal of the format vindicated. Free assessment, one fixed written figure including VAT; on cards and sticks where content has been deleted or overwritten, the figure is payable upfront. The card, once its filesystem was rebuilt, was perfectly sound again; and the gentle note for next time is the universal one — back up photos as diligently as she'd backed up her music, so an update can never again put a thousand of them at the mercy of a format prompt.

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.