Emergency · exFAT SDXC card on Windows
Recover an SD card on Windows without repairing it
How can I recover an SD card safely on Windows?
Short answer
Decline every repair first: when Windows offers to scan and fix the card, choose Continue without scanning and do not run CHKDSK, because both can rewrite exFAT metadata before the deleted entries are examined. Use a stable reader, scan the physical card read-only, for example with File Recovery Hero, and export to another drive.
The situation
A Windows computer detects the card, but production files are missing or the volume looks damaged.
Windows is helpful in exactly the wrong way here. It offers to scan and fix a card whose file system looks odd, and that offer, accepted once, rewrites the metadata a recovery scan would have used. Declining it is the first real step.
01 / Diagnose
Work out what actually disappeared
When an exFAT card is damaged or was removed during a write, Windows detects the inconsistency at mount time and proposes a repair. CHKDSK then makes the file system consistent by discarding what it cannot resolve, moving orphaned chains into a FOUND directory as numbered CHK files. Production files rarely survive that in usable shape.
Windows repair prompts and CHKDSK can change file-system metadata before the deleted entries have been examined.
Check the last known path, trash and backups without writing to the original device.
02 / Protect the source
Preserve the best recovery chance
- 1
Choose Continue without scanning on every prompt, and close any repair dialog that appears when the card is plugged in.
- 2
Use a powered internal reader or a known-good USB reader rather than a hub, so the card stays connected for the whole scan.
- 3
Select the physical card as the source in File Recovery Hero, not a mapped folder, and start the free read-only scan.
- 4
Review the results, then export with a licence to an internal drive or another external disk, never back to the card.
Do not run CHKDSK, do not use the format dialog, and do not install recovery software onto the drive you are about to scan. Each writes to the medium, and a card already missing files has no spare copy of the sectors that are about to be replaced.
03 / Choose the method
Match the tool to the source
For stable, readable exFAT, NTFS and FAT16/FAT32 or uncompressed IMG, DD, RAW and BIN images.
Unconfirmed exports are marked .UNVERIFIED.
Scanning is free; exporting the found files needs a licence at 50 EUR once. File Recovery Hero reads exFAT, NTFS and FAT16/FAT32 read-only and cannot help with a card Windows no longer detects, with encrypted media or with a physically damaged controller.
04 / Verify
Check the recovered content, not just its name
Open exported files from the target drive, not from the preview in the scan window. Sizes should match the format, photographs should render to the last line, and clips should play to the end. Exports flagged as unverified need this check most of all.
Keep the source until two verified copies exist. One working preview is not enough.
Sources and technical references
FAQ
Questions about this recovery case
Can exFAT SDXC card on Windows be recovered in this situation?+
Windows is helpful in exactly the wrong way here. It offers to scan and fix a card whose file system looks odd, and that offer, accepted once, rewrites the metadata a recovery scan would have used. Declining it is the first real step. The result still depends on what remains readable on the source.
What should I avoid before scanning?+
Do not run CHKDSK, do not use the format dialog, and do not install recovery software onto the drive you are about to scan.
Does scanning write to my memory card?+
Your memory card is only read. Nothing is saved to it.
How do I know whether the result is complete?+
Open exported files from the target drive, not from the preview in the scan window.