Canon EOS R10 RAW Files Suddenly Corrupted – Any Fix in 2025?

Hi all,

I’ve been using a Canon EOS R10 with a Lexar 128GB SDXC UHS-II card to shoot in RAW (CR3 format). Everything was working fine until recently. After an outdoor shoot, I tried transferring the files to my Windows 11 laptop, and about 50 of the 300 images showed up as corrupt—file icons are blank, and they won’t open in Lightroom, Photoshop, or even Canon’s Digital Photo Professional.

These specific files show errors like “unsupported format” or “file header missing.” I didn’t get any warnings on the camera while shooting, and I always safely eject the card.

I’ve tried Stellar, PhotoRec, and ExifTool, but no luck in fixing or even previewing those corrupted RAW files.

Has anyone faced a similar issue in 2025 with CR3 files or the R10? Any proven solutions out there for recovering or repairing partially corrupted RAW files?

Thanks a ton!

Photo

All Replies

Viewing 4 replies - 1 through 4 (of 4 total)

Xeyon

Participant

July 15, 2025 at 9:26 am

@Betty
Were you able to recover the image?? I m also dealing with the corrupt image.

HELP!!

Kai Vortex

Participant

July 4, 2025 at 8:45 am

You are indeed right, Lexar had a firmware glitch in late 2024 that caused your corrupted CR3 files, especially with burst mode shooting. If your card is from that batch, it’s best that you replace it immediately to avoid further loss.
Burst shooting can expose card issues if the card struggles with sustained writes or has contact problems.
Pro Tip: Always format your card in-camera before shoots, avoid removing it immediately after bursts, and test with a different card to confirm.

Nina Calder

Participant

June 27, 2025 at 8:22 am

Interesting. I’ve got a 256GB Lexar UHS-II and never faced anything like this, but I also format the card in camera every time I offload files. Could that be a factor? I remember reading somewhere that if you format via Windows, it messes with the allocation structure Canon expects.
Also, @JaceElric , did you say you saw previews in IrfanView? Mine never worked with CR3s. Do you need to install some plugin?

Jace Elric

Participant

June 27, 2025 at 7:19 am

Hey, I shoot with an R10 too (same lexar card, actually), and ran into a similar issue just last month. About 20 CR3 files wouldn’t open after a wedding shoot..same “unsupported format” error in lightroom and fastrawviewer.
I managed to get previews using IrfanView (surprisingly), but nothing would export. I tried running the corrupted files through LibRaw based tools (like RawTherapee) and even stellar repair for photo, but only partial previews came out. In my case, the issue turned out to be card-related—Lexar had a firmware glitch in a batch shipped in late 2024. Might be worth checking if your card is from that lot?
Also, were those shots taken continuously in burst mode by any chance?

Viewing 4 replies - 1 through 4 (of 4 total)