My vehicle-mounted DVR (model D9204-B14, Chinese brand) holds critical footage that no longer shows up through the normal playback interface. The unit runs an embedded Linux build: from what I can see there is a visible partition plus a hidden one where the data appears to be written sector-by-sector. Storage is an internal SSD. Reason for loss is probably due to date errors (showing 1970) not sure just a hunch. Nothing has been touched yet—no DIY tools, no third-party labs—so the drive is in the same state it was when the clips disappeared. I need every recoverable video, not just specific dates or events, pulled off the SSD and returned in a playable format. If you have previously extracted files from mobile or vehicle DVRs that use proprietary file systems or direct-to-block recording, please outline the approach you would take. Familiarity with hex-level carving, custom Linux file systems, and rebuilding fragmented video streams is essential. Deliverables: • Complete set of restored video files, organized chronologically if possible • Short technical summary of the steps and tools used so I can understand the process and preserve chain of custody Only proven DVR data-recovery specialists should bid; this footage is mission-critical and time sensitive.