Storage media · two exFAT camera cards
Recover a dual-slot shoot without mixing the cards
How should I recover files from a dual-slot camera setup?
Short answer
Always treat each card as its own source: label both, image them separately and never merge their files before comparing. A filename on one slot does not prove the same data exists on the other, and relay recording leaves deliberate gaps. Compare sequences, then recover only from the card holding each original.
The situation
The cards may contain backups, relay recordings, or separate RAW, JPEG, and video assets.
The mistake to avoid here is treating two cards as one pool. Backup mode, relay mode and split recording each leave a different pattern behind, so a gap on one card can be entirely normal. Keep the cards apart, image each one and compare the sequences before recovering anything.
01 / Diagnose
Work out what actually disappeared
In backup mode both slots hold the same files, in relay mode the second card takes over when the first is full, and in split mode one card keeps RAW while the other takes JPEG or video. A missing filename therefore proves nothing by itself. Mixing the two card contents into one folder destroys the evidence needed to tell a deliberate gap from a real loss.
A filename on one slot does not prove the same extent exists on the other, and relay mode creates intentional gaps.
Check the last known path, trash and backups without writing to the original device.
02 / Protect the source
Preserve the best recovery chance
- 1
Label both cards physically with the slot they came from and write down which mode the camera was set to during the shoot.
- 2
Create a separate sector image of each card and keep the two images in clearly named folders on different paths.
- 3
List the filename ranges and timestamps from both images side by side and mark the gaps that the recording mode does not explain.
- 4
Scan only the image of the card that actually lost material, read-only, and export its results into their own labelled folder.
Never copy files from one card onto the other to fill in gaps, and never let the camera reformat either card after a dual-slot problem. Merging the results of both sources into one folder makes it impossible to tell afterwards which card an asset came from.
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.
A relay gap is not a loss, and nothing can bring back a file that was never written to that card in the first place. File Recovery Hero reads exFAT, NTFS and FAT volumes and images of them; it cannot merge two card states into one reconstructed timeline.
04 / Verify
Check the recovered content, not just its name
The recovery is sound when every recovered file can be traced back to one card and one slot, when the filename sequence per card matches what the recording mode predicts, and when each file opens completely. Duplicates from backup mode should agree in size and content.
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 two exFAT camera cards be recovered in this situation?+
The mistake to avoid here is treating two cards as one pool. Backup mode, relay mode and split recording each leave a different pattern behind, so a gap on one card can be entirely normal. Keep the cards apart, image each one and compare the sequences before recovering anything. The result still depends on what remains readable on the source.
What should I avoid before scanning?+
Never copy files from one card onto the other to fill in gaps, and never let the camera reformat either card after a dual-slot problem.
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?+
The recovery is sound when every recovered file can be traced back to one card and one slot, when the filename sequence per card matches what the recording mode predicts, and when each file opens completely.