What to do right now
- Click Cancel on the format prompt and do not format the card in the camera or phone.
- Take the card out of the device and connect it through a card reader.
- Scan the card read-only, first by its file system records, then with a signature search if needed.
- Save the recovered files to the PC, and only then format or replace the card.
Step by step
Cancel every format prompt
Close the Windows dialog with Cancel. It will reappear each time you insert the card; keep cancelling. Also ignore Format card messages on a camera and Set up or Format offers on Android. Formatting writes a fresh, empty file system over the area that still describes your files.
Use a card reader
Remove the card from the camera, dashcam or phone and insert it into a USB card reader or the PC's built-in slot. A reader shows the card as a normal drive and avoids the device's own repair attempts. If the card has a lock switch, sliding it to lock is a sensible precaution, although not every reader honours it.
Check what Windows sees
Press Win+X and open Disk Management. A card that shows its real size with a RAW partition is a good candidate for software recovery. A card that shows No Media, 0 bytes or a wildly wrong size points to a failing controller, and a recovery lab is the realistic option for important files.
Scan the card
In FileFix Ultimate, open Deleted file recovery, select the card and start the Balanced scan. Most cards use FAT32 or exFAT; the app reads the backup boot sector and tries to rebuild the damaged one in memory, without writing to the card, so original names and folders like DCIM can come back.
Fall back to a signature search
If no file system is recognised, run the Deep signature scan. It finds JPEG, HEIC, camera RAW such as CR3, NEF and ARW, and MP4 or MOV videos by their content. These files come back without their original names, so sort by type and date and use the preview.
Save, check, then format
Save the results to a folder on the PC, never back to the card. Open a few photos and videos to confirm they are intact. When everything you need is safe, format the card in the camera you use it with, or replace it if it failed more than once.
Why an SD card suddenly turns RAW
A memory card keeps a small amount of bookkeeping at its start: the boot sector, the allocation table and the root folder. If the card is pulled out while a camera is still writing, if the battery dies during recording, or if the card is moved between devices without ejecting, that bookkeeping can be left half written. Windows then cannot recognise the file system and offers to format. The photos further into the card are usually untouched.
Worn flash memory is another cause. Cheap or very old cards develop weak cells, and a counterfeit card that reports more capacity than it really has will lose data once you fill it past its true size. In these cases the problem may come back, so treat the card as unreliable even after recovery.
What the format prompt really offers
The dialog is a generic Windows response to any volume it cannot read. It does not mean the card is beyond repair, and it does not check whether your files are still there. A quick format replaces the allocation table and folders with empty ones; a full format additionally writes over the entire card on current Windows versions. After a quick format a signature search may still find photos without names; after a full format there is usually nothing left.
Running CHKDSK is also a gamble on a RAW card. It may refuse to run, or it may rewrite structures in a way that discards entries a recovery scan could have used. Recover first, repair later.
Should you keep using the card
If the card went RAW because it was removed during writing, a format in the camera often makes it usable again. If it happens a second time, shows read errors during the scan or came from an unknown seller, replace it; cards are cheap compared to the photos on them. The Disk health & tools screen can test a card for fake capacity, but run that test only after your files are safe, because it writes test data.
When it won't work
- Cards that show No Media, 0 bytes or are not detected at all usually have a failed controller; software cannot read them.
- A full format in Windows or a low-level format in some cameras overwrites the card, and the photos cannot be recovered.
- Files recorded after the damage happened may have overwritten earlier ones in the same space.
- Photos and videos found only by signature search lose their original file names and folders, and large fragmented videos may be partial.
How FileFix Ultimate helps
- Opens the card read-only and blocks saving recovered files back to the same card.
- Uses the backup boot sector of FAT32 and exFAT cards to read the file system in memory, recovering names and the DCIM folder layout where possible.
- Searches by signature for JPEG, HEIC, camera RAW formats, MP4, MOV and other common camera files.
- Damaged file repair can rebuild an interrupted MP4 or MOV recording using a good reference video from the same camera.
FileFix Ultimate is free for personal use, works offline and never writes to the drive you are recovering from. Business use needs a one-year licence per PC. Check the signature before you run it.
Frequently asked questions
Why does the card work in my camera but not on the PC?
Some older or built-in readers cannot handle newer SDXC or high-speed cards and show them as unreadable. Try a different, recent USB card reader before assuming the card is damaged.
My Android phone says the SD card is damaged. Is it the same problem?
Usually yes. The phone cannot read the file system and offers to set the card up again, which formats it. Take the card out, read it on a PC with a card reader and recover the files first.
I already clicked Format by accident. Is everything lost?
Not necessarily. If it was a quick format and you have not saved new files to the card, a Deep signature scan can often still find photos and videos, though without their names. Stop using the card and scan it as soon as possible.
Do I need administrator rights to scan the card?
Reading a card as a whole physical device usually needs them. If the app asks, restart it as administrator; it still only reads the card.