Audio · exFAT audio media
Ogg/Opus recording: recover after deletion
How can I recover Ogg or Opus recordings after deletion?
Short answer
Yes, often: deleted Ogg or Opus recordings stay on the card until overwritten, and their structure helps validation. Stop recording and scan the card read-only. Every Ogg page starts with the OggS marker and carries a checksum, so broken parts of a recovered file can be detected and skipped rather than ruining the whole take.
The situation
Ogg or Opus recordings no longer appears in its recording folder even though the storage device is still detected.
The card mounts and the folder is there, only the recording is not. Deletion took the entry, not the pages: an Ogg file is a sequence of pages that each begin with the OggS marker and carry a checksum, which is why a scan can still recognize and reassemble them.
01 / Diagnose
Work out what actually disappeared
Freeing a file on exFAT clears its directory entry and marks the clusters available, while the Opus packets inside their Ogg pages stay untouched until new data arrives. Each page holds a serial number that ties it to its stream and a granule position that places it in time, so pages found in raw data can be sorted back into the right recording.
Deletion can release a directory reference before later writes reuse every block that belonged to the file. For Ogg/Opus recording, this matters because Ogg pages, serial numbers and granule positions order compressed Opus packets
Check the last known path, trash and backups without writing to the original device.
02 / Protect the source
Preserve the best recovery chance
- 1
Stop the recording device, power it off and read the card only through a card reader from this point on.
- 2
Note the codec, the channel count and the expected length, since names and dates may not survive the recovery.
- 3
Scan the card read-only and turn down every prompt to verify, index or repair the volume.
- 4
Export the results to a different drive and check each file with a tool that validates Ogg page checksums.
Do not make a test recording on the card and do not let a media library write onto it. A page whose checksum fails is skipped by decoders, so each new write costs exactly the seconds of audio that sat in the clusters it took.
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.
File Recovery Hero reads the exFAT card read-only, scans free of charge and exports for 50 EUR to another drive. It does not repair Ogg pages that failed their checksum, and it cannot reconstruct packets from clusters that a later recording has claimed.
04 / Verify
Check the recovered content, not just its name
A complete result plays without dropouts and reports a duration close to the one you noted, which comes from the granule position in the final page. A checksum test that flags broken pages tells you precisely where audio was lost, instead of leaving that to guesswork while listening.
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 audio media be recovered in this situation?+
The card mounts and the folder is there, only the recording is not. Deletion took the entry, not the pages: an Ogg file is a sequence of pages that each begin with the OggS marker and carry a checksum, which is why a scan can still recognize and reassemble them. The result still depends on what remains readable on the source.
What should I avoid before scanning?+
Do not make a test recording on the card and do not let a media library write onto it.
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?+
A complete result plays without dropouts and reports a duration close to the one you noted, which comes from the granule position in the final page.