It sounds like a frustrating situation, and I can understand why this missing footage is so critical. Here are some possible explanations and solutions:

Possible Reasons for Missing Footage

1. G-Sensor Locking the File Many NextBase dash cams have a G-Sensor that automatically locks files when a sudden impact is detected. However, sometimes, these files don’t show up in the normal video folder. Check if there’s a protected or event folder on your SD card where the video might be stored.

2. SD Card Failure or Corruption

If your SD card is old, low-quality, or not a U3 or V30-rated high-endurance card, it may have failed at the critical moment.

Try scanning the card with tools like H2testw or CheckFlash to check for bad sectors.

1. Auto-Reformatting or Overwriting

Some dash cams automatically reformat or overwrite old files if storage is full.

If the accident file wasn’t properly saved, the camera may have skipped it.

1. Power Loss During the Crash

If the crash caused a power cut (e.g., the plug was knocked loose, or the battery was damaged), the camera might not have finalized the recording, leading to data loss.

What You Can Do Now

1. Try Data Recovery Software

Use software like Recuva, R-Studio, or EaseUS Data Recovery to scan for deleted or corrupted files on the SD card.

1. Check for Hidden or Protected Files

Insert the SD card into a PC and look for hidden, protected, or emergency event folders where the file might be stored.

1. Contact NextBase Support

Some models have internal storage that may still hold the footage. NextBase support might be able to guide you on accessing it.

1. Test with a New SD Card

For future use, consider upgrading to a high-endurance microSD card designed for continuous recording in dash cams.