What causes it
A drone records the way any camera does: the file is finished when recording stops. Drones have more ways for that not to happen.
- A crash cuts power or throws the battery out.
- The battery reaches its cutoff and the drone shuts down.
- The drone is lost, then found later with the recording never stopped.
- The card is pulled, or the drone is switched off, before the recording is ended.
In each case the footage up to that moment is usually written, and the file is left unclosed.
Drones add one complication. Depending on the model, footage may go to a removable card, to storage built into the drone, or to either. Which one yours used decides what can be done.
What to do right now
- Take the card out before you power the drone on again.
- Don’t let the drone or its app format the card or the internal storage.
- Work out where the footage was recorded: removable card or internal storage.
- Check the app on your phone or controller. Some keep a lower-resolution copy of what the drone recorded. If it’s there, save it somewhere safe.
- If the card opens on a computer, copy everything off, including files that won’t play.
- Note what happened and when: crash, battery cutoff, water, or a delete or format.
What’s realistically recoverable
An unclosed recording on a card that reads is often repairable. This is a Complex recovery. A short clip recorded by the same drone at the same settings, on a different card, helps as a reference.
A deleted or formatted card that still reads is usually Standard, as long as nothing has been recorded on it since.
Recovered clips can come back with generic names and without their original dates.
When it isn’t
- Internal storage after a delete or format. Internal storage on drones is often unrecoverable once TRIM has run. TRIM is the drone telling its storage that deleted space can be erased, and once that’s done there is nothing left to read.
- A card damaged in the crash. If it’s cracked, or no reader can detect it, it’s a physical case. Some of these I can do at my bench, quoted after evaluation. The rest I refer out, at no charge.
- Footage that was recorded over. Gone.
- The drone. I recover footage. I don’t repair drones or get them flying again.