By erasing the card with o/PARASHOOT before returning it to the camera, you signal that it has been downloaded and checked and is ready for reuse. Using this signaling system, any card inserted into the camera which is found to contain footage should be immediately checked to confirm it was properly downloaded and verified.

As an added benefit, every camera will force you to format a card erased with o/PARASHOOT before allowing it to be used for recording. This will not only save time on set but also ensures that the card is always properly formatted in camera before each use.

o/PARASHOOT checks for file name and file size on one of your backup destinations. No checksums are verified though!

o/PARASHOOT erases the card by flipping every bit of the first 2MB (2 * 1024 * 1024 bytes) of the card. Every 0 becomes a 1 and every 1 a 0. This destroys all file system information in a controlled way and can be easily reversed. As an added benefit every camera will force you to format such a card before allowing it to be used for recording. This will ensure that the card is always properly formatted in camera before each use.

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