Recover CR3 files from a formatted card on a Mac (Canon R-series)

The in-camera format on a Canon EOS R5, R6, R7, R8, R10, R50 or R3 takes about a second. It doesn't erase your photos. On the exFAT cards these bodies use, a standard format rewrites the boot sector, the allocation bitmap and the root directory, and leaves every cluster of image data exactly where it was. The files are unlisted, not gone. What you have to do is get them out before anything writes to the card, and understand what a CR3 recovery looks like once you do.

Every new photo the camera writes lands on the clusters the old photos occupied, because the format marked them free. One burst of RAW frames can overwrite dozens of old ones. Take the card out, put it in a reader on your Mac, and don't let the camera near it again until the recovery is finished. Don't run First Aid on it, don't let Photos import from it, and don't format it again.

Canon's older CR2 format is TIFF-based: it starts with the `II*` bytes any TIFF carver recognizes, and it has EXIF IFDs pointing at the image data. CR3, introduced with the EOS R and M50, is different. It's an ISO Base Media File container, the same family as MP4, MOV and HEIC. The file begins with a `ftyp` box whose major brand is `crx `, followed by `moov`-style metadata boxes (Canon calls its layout CRX) and then the image payload: a full-size JPEG preview, a smaller JPEG thumbnail, and the compressed sensor data.

A recovery tool that only knows CR2 will not find a single CR3 on a formatted card. A tool that carves ISO-BMFF files by their `ftyp` box will find every one, because that box is exactly where the file starts. DataRecover Pro's deep scan carves by `ftyp`, validates that a real ISO-BMFF box chain follows (so random `ftyp` bytes on the card don't produce junk), and sizes the file by walking the box lengths rather than guessing at an end marker. That's the right way to carve a CR3.

Quick scan first. If the format was a quick format and the camera hasn't written since, exFAT's old directory entries are sometimes still readable on disk and the quick scan can return files with their original `IMG_1234.CR3` names and the DCIM folder structure. That's the best case and it's worth thirty seconds to check.

Usually, though, an in-camera format wipes the directory and you're carving. Carved files come back intact but nameless: the app assigns a sequential name and the extension, and because CR3 shares its container family with video, a carved CR3 can surface with a generic container extension. Renaming the file to `.cr3` fixes that; the bytes are the same. Shooting date, camera, lens and exposure are all inside the file's metadata, so you can re-sort the batch by capture time in Lightroom, Capture One or Canon's DPP once they're recovered. What you don't get back is the original filename.

Preview works because every CR3 carries that full-size JPEG preview. DataRecover Pro's results grid shows thumbnails and Quick Look renders the frame, all free before you pay. If a CR3's sensor data was partly overwritten, the embedded JPEG is often still complete, and the repair engine's extraction fallback can pull it out as a usable image. It isn't RAW, but it's the shot.

1. Put the card in a reader (the camera over USB is slower and some bodies expose the card read-only or not at all). If the card is a CFexpress card, see CFexpress card recovery on Mac for the reader and imaging notes.

2. Open DataRecover Pro, select the card, and run a quick scan. If your CR3s appear with names, recover them to your Mac's drive or an external, never back to the card.

3. If not, run a deep scan. Filter results to images. Use the thumbnails to skip the frames you don't want; a burst-shooting session can be thousands of files and there's no reason to recover the misses.

4. Recover the selection to a different drive. Import into your RAW editor and sort by capture time.

Scanning and preview are free and need no account; recovery is $89 lifetime or $59 a year for 3 Macs, and if it can't recover your files you don't pay. Download DataRecover Pro.

Before any of this, check whether the camera was writing to both slots. Many R-series bodies default to recording RAW to slot 1 and JPEG to slot 2, or mirror both. If the other card wasn't formatted, you may already have a copy and can skip recovery entirely.

If you kept shooting after the format, the frames that got overwritten are gone; you'll recover the rest. A low-level or "secure" format that zeroes the card (some bodies offer this) leaves nothing to recover. A card that's not detected by any reader, or that shows the wrong capacity, has a controller or flash failure and needs a lab, not software. And a burst of large CR3s written to a nearly-full card can be fragmented, in which case the carved file has the wrong tail and the embedded preview is the salvage.