Fundamentals
SD card recovery: the complete procedure
What has to happen in which order — and what you must never do.
The short answer
The order matters more than the tool.
Almost every failed recovery fails not because of the program but because of a step before it: continuing to shoot, approving a format, running a repair. This procedure describes the full chain from the first minute to a verified export.
01 / Understand
Why there is anything to recover at all
When deleting, a file system normally removes not the data but only the reference to it. The occupied area is marked free and the content stays put. That is exactly why recovery works — and exactly why haste is bad advice.
SDXC and microSDXC cards ship formatted with exFAT. That file system manages files through directory entries, an allocation bitmap and a file allocation table. On deletion, entries are marked and chains released; the cluster heap holding the actual data is untouched.
The practical consequence: the state right after the loss is the best there will ever be. Every further recording, repair and format makes it worse.
02 / Classify
Which case is yours?
The last two rows matter most: as soon as a device behaves unstably, software is no longer the cheaper attempt but a risk. A lab is then the right route.
| Symptom | Likely cause | First step |
|---|---|---|
| Files deleted by accident | Directory entries released | Remove the card from the device at once |
| Card suddenly empty, DCIM gone | Management structure damaged | Do not format, create an image |
| System demands formatting | File system not readable | Decline, create an image |
| After a quick format | Structures new, data usually intact | Write nothing further |
| Read errors or dropouts | Possible physical damage | Stop, consider a lab |
| Card not recognised | Controller or contacts | Do not reconnect repeatedly |
03 / Secure
An image first, everything else after
- 1
Take the card out of the camera or recorder and use a different card for the rest of the day.
- 2
Connect the card through a reader and only check whether it is recognised reliably — do not scan yet.
- 3
Write an uncompressed image of the whole card to a different drive (IMG, DD, RAW or BIN).
- 4
Set the physical card aside afterwards and work exclusively with the image.
- 5
The image can be scanned as often as you like, with different tools, without stressing the card again.
Do not approve formatting just because Windows or macOS suggests it. Both offer this when they cannot read a file system. At that moment the recordings are usually still complete.
04 / Scan
Search deliberately, not for everything
Select only the formats you are actually looking for. A scan across 36 file extensions takes longer and produces candidates you then have to sort out. If you know it is about CR3 and MP4, scan CR3 and MP4.
Before scanning, note the camera model, recording format and approximate clip duration. You need these later to judge whether a result is plausible: a 200 megabyte file cannot be a twenty-minute 4K clip.
Export exclusively to a physically different device. Not to a second partition of the same card, but to genuinely separate hardware.
05 / Verify
A hit is not yet a recovery
- Open every important file fully, not just the preview. For RAW files that means developing it in a RAW converter.
- Play video clips across their whole duration, not just the first few seconds.
- Compare file sizes with what is plausible for that duration and resolution.
- For series, check the number range and timestamps for gaps.
- Take the .UNVERIFIED marking seriously: it means completeness could not be confirmed.
- Keep the original card until at least two verified copies exist.
06 / Read on
Specific cases in detail
This procedure applies to all memory cards. For your specific case — a particular camera, format or symptom — the guides hold a dedicated walkthrough with the matching detail.
Common questions
How long do deleted files stay on an SD card?
There is no deadline. They stay until the storage area is written to again. An unused card can keep recordings for years; a card still in use can lose them in minutes.
Can I still recover anything after formatting?
After a quick format usually yes, because only the management structures are recreated. After a full format that overwrites the data area, generally not.
Do I really need an image, or can I scan directly?
Scanning directly works as long as the card reads reliably. An image is still better: it reads the card exactly once and then allows any number of attempts without further stress on the original.
Which cards does File Recovery Hero support?
Stable, readable exFAT, NTFS and FAT16/FAT32 devices plus uncompressed IMG, DD, RAW and BIN images. APFS, HFS+ and ext4 media, encrypted storage and physically damaged cards are outside the scanning scope.
Can I use the SD card again after data loss?
Only after every important file has been checked in full and saved in at least two places. Until then leave the card untouched, because every new recording can overwrite deleted areas.
How much does professional SD card recovery cost?
It depends on the fault and the provider. For a reliably readable card, start with a free scan; read errors, dropouts or a card that is not recognised need a lab assessment.
Your case in detail.
The guides hold a dedicated walkthrough for your symptom.