Audio · exFAT field recorder card
Broadcast Wave/BWF: recover after a quick format
Can BWF recordings with production metadata be recovered after a quick format?
Short answer
Often yes, but recovered takes may lose their original file names: the quick format discarded the directory, while the bext and iXML chunks inside each file survive. Eject the card without a test take, scan it read-only, and rename recovered takes from their embedded scene, take and timecode data.
The situation
The medium now has a new empty directory, while the previous BWF recordings with production metadata is missing.
The directory is gone but the identity of each take is not. Scene, take, roll and timecode live in the bext and iXML chunks inside the files, so recovered material that arrives under generic names can be renamed from its own content rather than from guesswork.
01 / Diagnose
Work out what actually disappeared
A quick format writes new exFAT management structures and leaves the audio where it is. What disappears is the naming scheme the recorder applied, which usually encodes scene and take. Because BWF keeps the same information inside each file, this is an inconvenience for sorting rather than a loss of production data.
A quick format can replace file-system records without immediately overwriting every older content block. For Broadcast Wave/BWF, this matters because bext, iXML and timecode metadata may matter alongside the PCM payload
Check the last known path, trash and backups without writing to the original device.
02 / Protect the source
Preserve the best recovery chance
- 1
Eject the card without a test take and keep the recorder away from it until the scan is done.
- 2
Scan read-only and export to an internal drive with room for the whole card, leaving the card itself untouched.
- 3
Read the bext and iXML chunks of every export and list scene, take, roll and timecode start.
- 4
Rename the files to your usual scheme from those values, then check the list against the sound report.
Do not record a new take on the formatted card and do not let the recorder initialise it again. Do not batch-rename before the chunks have been read, because a name invented by hand can attach the wrong scene to a take for the rest of post-production.
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 formatted exFAT card read-only and exports the files it can still see; names, folders and dates lived in the directory the format replaced, and renaming from the chunks stays a manual step. Material already covered by newer recordings cannot come back.
04 / Verify
Check the recovered content, not just its name
The session is back when every take in the report exists once, its embedded timecode matches the noted start, and the audio plays complete at the recorded sample rate and channel count. Two exports carrying the same timecode and scene point to a duplicate the scan built from overlapping blocks.
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 field recorder card be recovered in this situation?+
The directory is gone but the identity of each take is not. Scene, take, roll and timecode live in the bext and iXML chunks inside the files, so recovered material that arrives under generic names can be renamed from its own content rather than from guesswork. The result still depends on what remains readable on the source.
What should I avoid before scanning?+
Do not record a new take on the formatted card and do not let the recorder initialise it again.
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 session is back when every take in the report exists once, its embedded timecode matches the noted start, and the audio plays complete at the recorded sample rate and channel count.