Camera memory card error: how to recover the photos first

Step by step

1. Stop and take the card out

   Do not press Format, Initialize or OK on a format prompt. Switch the camera off before removing the card, so it is not interrupted in the middle of a write. Check that the small lock switch on a full-size SD card has not moved, because some cameras report a locked card as an error.

2. Read the card on a PC

   Insert the card into a USB card reader. If Windows says you need to format the disk, choose Cancel. Note what you see: the photos open normally, the drive shows as empty, Disk Management lists it as RAW, or the card does not appear at all. Each case points to a different cause.

3. Copy anything that is still visible

   If File Explorer still shows the DCIM folder, copy the photos to the PC first. A camera can refuse a card for reasons that do not stop a computer from reading it, such as a damaged index file or an unsupported folder layout.

4. Image the card if it reads badly

   If copying stalls, the card disconnects or the scan is extremely slow, open Disk health & tools and choose Create drive image (skip bad sectors). Save the image to another drive. Unreadable areas are skipped and retried later, and every further scan reads the image instead of the weak card.

5. Scan for JPEG and RAW photos

   In Deleted file recovery, select the card or the image and run the Balanced scan. If the file system is RAW or the results are thin, run the Deep signature scan, which recognises JPEG, HEIC and camera RAW files such as CR2, CR3, NEF, ARW, DNG, ORF, RW2 and RAF by their structure.

6. Save elsewhere, then deal with the card

   Save the photos to the PC or an external disk and check each file's status. Only after that, test the card with the fake capacity check or surface scan, then format it in the camera before using it again. A card that errors twice is better replaced.

What the camera's messages usually mean

Format this card or card cannot be used normally means the camera found the FAT32 or exFAT structures damaged or unfamiliar. It is a reading problem, and the image data behind it is usually untouched. No images or no image can sometimes appear simply because the DCIM folder or its index was damaged, or because the card was last used in a different camera brand that names folders differently.

Card error or cannot access card is broader. It can be a dirty contact, a card the camera does not support, a counterfeit card whose real capacity is smaller than its label, or a card that is failing. That is why the PC test in step two matters: a card that a reader sees normally is a file system problem, while a card that is invisible everywhere is a hardware problem.

Common ways a working card turns into a card error

Most card errors follow an interrupted write: the battery died while the camera was saving a burst, the card was pulled out while the access light was on, or the camera was switched off during video recording. Moving one card between a camera, a phone and a laptop also invites trouble, because each device may write its own hidden folders or ask to repair the card in its own way.

Well-meant fixes can make it worse. Formatting in the camera rebuilds the file system and, on many models, leaves the old photos recoverable only by signature search, without names. Running repair tools such as CHKDSK can turn damaged entries into fragments with meaningless names. Recover first, then repair or format.

Getting RAW files back, not just the JPEGs

Photographers who shoot RAW plus JPEG often see the JPEGs return and the RAW files go missing. RAW files are much larger, so on a card that has been filled and erased many times they are more likely to be fragmented, and a signature search can only reassemble them in order when the pieces happen to be contiguous. A recovered RAW that opens with a grey or striped lower half is usually a fragmentation problem, not a broken converter.

Results found through the FAT32 or exFAT records keep their names such as IMG_1234.CR3 and are the most complete. Results found by signature are numbered instead. Keep any JPEG copy as a fallback when the RAW is only partial.

When it won't work

• If the card is not detected by any reader or PC, or shows a size of 0 bytes, the controller has likely failed and only a recovery lab can read the memory chips.
• Photos taken after the card was formatted have overwritten some of the old ones.
• A full format, or a camera's low-level format option that writes the whole card, leaves nothing to recover.
• A cracked card or bent contacts need physical repair before any software can read it.

How FileFix Ultimate helps

• Opens the card read-only, so the scan never writes to it, and refuses to save photos back onto it.
• Finds JPEG, HEIC and camera RAW formats including CR2, CR3, NEF, ARW, DNG, ORF, RW2 and RAF by content, even when the card shows as RAW.
• Creates a drive image that skips bad sectors and can be resumed, so a failing card is read as few times as possible.
• Checks for fake capacity and runs a read-only surface scan to decide whether the card can be trusted again.

Frequently asked questions