Data Recovery Case File · Cameras, Drones & Cards · The Recorder's Dialect

"Could you recover video files with audio from a Seagate surveillance drive?" — yes: the CCTV system's private filesystem read directly, the footage rebuilt into files any computer can play

His enquiry was a model of the practical kind: the drive is a 2TB SATA Seagate surveillance model from a Swann CCTV system, the recordings are "around 1.5GB in size," he needs video with its audio, and he had two questions — "how much would this cost?" and "do I need to supply a device to copy the recovered data to?" Both get direct answers below. But the shape of his first sentence — "I am wondering if you could recover video files… from a Seagate Surveillance HDD" — suggests he may already have tried the obvious thing and met the standard surprise: connect a CCTV drive to a computer and the computer offers to format it, as though two terabytes of footage weren't there at all. They are. The drive simply doesn't speak the computer's language — and translation is bench work.

The decode: why the recorder's drive is gibberish to a PC — and where the audio lives

The private filesystem: CCTV recorders don't store footage as tidy folders of video files. They treat the drive as one enormous reel, writing camera streams into their own indexing scheme — a private dialect each recorder brand speaks fluently and ordinary operating systems don't recognise at all. Hence the "unformatted" verdict a computer gives: it isn't reporting damage, it's reporting incomprehension. Declining that format offer is the single most important move in this genre — a format would begin genuinely destroying what mere incomprehension had left perfectly intact.

The 1.5GB pieces: his size observation is the recorder's chunking made visible — continuous recording sliced into segments of managed size, stitched end-to-end by the index. And crucially for his request, the audio rides inside those same segments, interleaved with the pictures rather than stored separately. Recovering "video with audio" therefore isn't two jobs but one done properly: read the recorder's index, follow each camera's chain of segments across the drive, and carry the interleaved sound along with the vision at every step.

The reassembly: from a write-blocked image — never the original, because surveillance drives spend their lives writing around the clock and arrive with wear on them — the segments are decoded and re-wrapped into standard, self-contained video files with the audio track intact and in sync. The result plays on any computer, which is rather the point: footage that needed one specific recorder to be watchable becomes footage that needs nothing special at all.

His two questions, answered the way they should be

"How much would this cost?" The honest structure, because the number depends on what assessment finds: the assessment itself is free; it produces one fixed written figure, including VAT, before any chargeable work begins; and the whole job is covered by no recovery, no fee. No hourly meters, no revisions mid-job.

"Do I need to supply a device to copy the recovered data to?" Either way works, and the written quote says so plainly: new delivery media of appropriate size can be supplied at cost, or footage can be copied to a drive he provides. Nothing about delivery is left to assumption.

The outcome

The surveillance drive imaged, its dialect translated, and the footage delivered as ordinary playable files — with the audio confirmed present and in sync by spot-playing segments across the recorded span, not just by counting files. The original drive returned untouched beyond its careful imaging.

Our case files are drawn from genuine enquiries received by our laboratory over the past ten years, anonymised to protect client confidentiality. Each one describes the diagnostic and recovery procedure our engineers apply to that fault, using the equipment listed.