Data Recovery Case File · Cameras, Drones & Cards · Textbook

The Best Position This Work Offers

His enquiry reads like a worked example, and it deserves an encouraging answer rather than a cautious one. "I deleted all the photos on my SD card from my camera by mistake. This is the first time I have used both the SD card and the camera, and I have not used either since the deletion occurred. There were around 700 photos at the time of deletion, and I wondered what possibility there may be of recovery?" Three details, each doing real work. Deletion does not erase, nothing has been written since, and the card had no previous life on it. That combination is about as favourable as this work gets.

The decode: why each detail matters, and the single instruction

Why deletion leaves everything in place: removing photographs through a camera updates the index to mark their space as available for reuse. It does not visit the image data or overwrite it — that would take time, wear the memory, and serve no purpose, since the objective is to free space rather than destroy anything. So all seven hundred images are physically present on that card, unlisted rather than removed.

Why not using it since is the decisive fact: the only thing that can genuinely take those photographs away is new data written over the top. He has not put the card back in the camera and has not written to it. Nothing has been written, so nothing has been lost. This is the single variable that separates a full recovery from a partial one, and it is entirely within an owner's control — which is why the instruction is always the same and why it matters so much that he followed it without being told.

Why first use of the card helps more than it seems: a card that has been filled and emptied many times carries layers of older material in its free space, and carving finds all of it — producing thousands of fragments from previous sessions mixed in with what is wanted. A card in its first use has no such history. What is on it is his seven hundred photographs and nothing else, which makes the result clean and the sorting trivial.

Why the count is useful: knowing roughly how many images existed gives a target to reconcile against. A recovery returning something close to seven hundred rendered images is verifiably complete; one returning three hundred prompts a second look rather than being accepted. Most people cannot say how many files they lost, and it is worth stating when you can.

What is actually done: the card is imaged first so nothing further touches the original, the index remnants are reconstructed where they survive — which can return images with their original filenames and dates — and signature carving sweeps the full extent regardless, identifying photographs by their own internal structure.

The single instruction, and it is the whole of the advice: keep the card out of the camera. A camera with a card in it will write to it, and switching one on to check is enough.

On the bench

The card was imaged write-blocked behind the DeepSpar USB Stabilizer 10Gb so nothing further touched the original. Index remnants were reconstructed where present, since that returns photographs with their original filenames and dates rather than as an unnamed set, and signature carving swept the full extent alongside. The recovered count was reconciled against the owner's stated total — since a known figure turns a plausible-looking result into a verified one — and every image was validated by rendering.

The outcome

The card imaged write-blocked, the index reconstructed, the full extent carved and the recovered count reconciled against the stated total. Recovery of deleted or overwritten data from memory cards and USB sticks is charged at a flat figure, payable upfront. The decode, for anyone who has just deleted a card: this is the best position there is. Deleting through a camera marks the space available rather than erasing anything, so your images are physically present. The only thing that removes them is new data written over the top — which is why not using the card since is the decisive fact, and it is the one variable entirely in your hands. Keep it out of the camera, and say how many photographs there were.

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.