Memory card data recovery

Memory card data recovery – SD, microSD and CF

Losing photos or video from a memory card is an urgent situation. Formatting in camera, card errors, file-system corruption or interrupted recording can remove access to the only copy of your data. In such cases, quick reaction and zero additional writes are crucial.

At Dysk i Spółka, we recover data from SD/microSD, CF, CFast, XQD and CFexpress cards as well as media used in drones, cameras and recorders. We handle both logical cases (deletion, formatting) and controller failures, connector damage and monolithic media.

🧩 Main technical challenges with memory cards

Most common scenarios we see in the lab

• Formatted in camera/camcorder and no visible files
• Deleted photos / video (often recoverable if nothing was written afterwards)
• Corrupted file system and format prompts
• Interrupted recording and damaged video files (MOV/MP4/RAW)
• Damaged connector / cracked card (hardware issue)
• Controller failure — the card is not detected or shows 0 MB
• Monolithic media (microSD / USB flash) — require laboratory work

With memory cards, the most important rule is not to make any additional writes (for example, by taking more photos). This simple rule often decides whether recovery succeeds.

1. Logical recovery after deletion or formatting

In many cases, the data is still on the card — only the file-system pointers are gone. That is why quick preservation of the media and working from an image is crucial.

• Our method: We create an image of the card and recover files in a controlled way, preserving the folder structure whenever possible.

2. Reconstruction of video files and damaged recordings

Interrupted recording often results in missing headers and a damaged container structure. In such cases, standard tools may fail to detect valid files.

• Our method: We reconstruct recordings (for example MP4/MOV) and recover the material with the device, codecs and data fragmentation in mind.

3. Laboratory work (monolith / controller / chip-off)

If the card is not detected or the connector is damaged, work at the memory-chip level (monolith) or direct NAND reading may be necessary.

• Our method: We diagnose the electronics and, if needed, perform NAND reading and reconstruct the data into a logical image.

🚨 Emergency procedure for memory cards — what to do immediately

Supported cases and environments

• Media: SD/microSD/CF/CFast/XQD/CFexpress
• Devices: cameras, camcorders, drones, recorders — photo/video data
• Cases: deleted files, formatting, card errors, corrupted file system
• Video issues: interrupted recording, "cannot be played"
• Hardware damage: connector, cracks, liquid exposure

Contact us by phone first. If it is a memory card or USB flash drive, do not record anything else and do not format it — we will tell you how to secure the media for transport.

What memory card recovery looks like — step by step

1. Diagnosis and risk assessment — we determine the type of failure (logical vs hardware).
2. Imaging the media — we work from a copy so there is no risk of overwriting.
3. Data reconstruction — file recovery and video-structure repair, when needed.
4. Verification of the material — we check playback and file completeness.
5. Secure handover of the data — on the client's drive or on a new device.

🛡️ Safety and priority

Because of the sensitive nature of the data, we offer priority diagnostics for memory cards and USB flash drives. We work on media clones, which protects the original from further degradation, and we can sign an NDA before recovery begins.

Memory card failure symptoms

Memory cards can stop working suddenly (after an interrupted write, a drop, liquid exposure or natural wear). The symptoms below usually mean that the data needs to be secured quickly.

• the card is not detected in the camera or computer, or appears only intermittently
• the message "format the card" appears even though files were on it
• photos / videos disappear, files show 0 KB or cannot be played
• read / write errors, very slow copying, freezes during access
• changed capacity, unusual media name, missing partition
• damaged file system (RAW) or "access denied"

If the data matters, stop further write attempts and do not format the card — laboratory diagnostics will show which recovery method is safest.

Why choose our data recovery laboratory

Data recovery requires specialist equipment and experience. In our laboratory we use professional tools designed to work with damaged storage media.

• diagnostics of damaged storage devices
• specialist data recovery tools
• safe work on a sector-by-sector clone
• data recovery from many types of devices

Every case is analysed individually so we can choose the right recovery method for the card, flash drive or monolithic media.

FAQ — Data recovery from memory cards

The camera or computer asks to format the card — what should you do?

Do not format the card if the data matters. This message usually means a damaged file system — the safest option is to stop using the card and have it diagnosed.

Can deleted photos be recovered?

Often yes, if the card was not used further. Every new write after deletion reduces the recovery chances, so it is worth stopping immediately.

Will formatting help recover data?

Formatting usually does not restore data and may make recovery harder. Even after formatting, part of the files can still sometimes be recovered.

What does RAW, 0 KB or very slow copying mean?

These are typical symptoms of file-system or flash-memory problems. Further copy attempts can generate more errors and worsen the condition of the media.

How should you secure the card after a failure?

Stop writing new files, do not format it and do not force "repairs". This increases the chance of safe recovery.