One thing to know first
Don't let anything repair it. That prompt is the danger, not the fault.
The device is visible, which means the hardware is talking. What has failed is the filesystem, the index describing where each file begins and ends. Your files are almost always still sitting on the media untouched. The damage in this scenario is nearly always self-inflicted afterwards: chkdsk, Disk Utility's First Aid, or a format writes new structures over the damaged ones, and in doing so overwrites the information a recovery would have used to reassemble your files.
Often fixable yourself
CCTV recorder shows up but won't open
A CCTV recorder in this state is very often something you can resolve yourself, at no cost, and this page tells you how before it tells you anything about us. Where that doesn't work, the rest explains what the fault usually is and what recovery involves.
What this usually turns out to be
This one is usually not a fault at all. Recorders write their own proprietary layout rather than a standard filesystem, so a perfectly healthy CCTV drive taken out of its recorder and connected to a Windows machine reads as unformatted every single time, by design. That is the expected result and it means nothing is wrong. The genuine version of this fault is the recorder itself reporting that it cannot read its own disk, which points at the recording index rather than the video data, and the footage generally survives the loss of the index.
Recorders write in a manufacturer's own format and loop over the oldest footage continuously. The clock on a CCTV job is retention, not hardware.
Corrupt filesystem metadatabetter news
The master file table or catalogue is damaged. The file content is intact and reachable; the map to it is not.
Interrupted write or unsafe removalbetter news
Power lost or the device pulled mid-write, leaving the filesystem in an inconsistent state. Usually very recoverable.
Bad sectors in the metadata region
The drive is degrading and the unreadable areas happen to be the ones holding the index. This case does have a clock on it.
Encryption without the key
BitLocker, FileVault or a NAS volume password. The data is intact but mathematically unreachable without the key or password.
What to check first on a CCTV recorder
- If you reached this page after plugging a recorder drive into a computer: what you saw is normal. Disconnect it and do not act on what Windows told you.
- If the recorder itself reports the disk is unreadable, note the exact message and check whether live view and new recording still work.
- Establish the retention window and the incident date before deciding whether any of this matters.
What not to do
Do not let Windows format or initialise the disk, which it will offer to do the moment you connect it, and which is entirely destructive to footage that was never damaged. Do not let the recorder rebuild or repair its storage either, because that regenerates the index by scanning and overwriting.
Try this before you pay anyone
Before anything else: what you were shown is probably normal
- If you reached this after connecting a recorder drive to a computer and being told it needs formatting, that is the expected result on a healthy CCTV disk and it means nothing is wrong. Disconnect it.
- If the recorder itself reports it cannot read the disk, note the message and check whether live view and new recording still work.
- Work out the retention window and the date of the incident before deciding whether any of this matters.
Do not run carving or partition-repair software against a recorder disk, and do not let Windows format or initialise it. Recorders use a proprietary layout that these tools do not understand, so they will report the disk as empty or damaged when the footage is entirely intact, and any repair they write destroys the recording index that maps timestamps to video.
How recoverable this is
Usually good, and often very good, because the media is intact and the fault is in the description of the data rather than in the data. The main determinant is not the original fault at all. It is whether a repair tool has already been run. Cases that arrive untouched tend to go well. Cases where chkdsk has already rewritten the structures are meaningfully harder, and sometimes that is what decides the outcome.
What moves it, for your device specifically:
- Whether a repair, format or chkdsk has already been run against it
- Whether the underlying media is healthy or has bad sectors
- Whether the volume is encrypted, and whether the key or password is available
- How much has been written to the device since the problem appeared
We will not give you a percentage for your device, and you should be wary of anyone who does. Nobody can know what is recoverable until the media has been imaged and read. What is above describes this class of failure; your drive gets its own answer after an assessment, in writing, at no cost.
What it costs
Quoted after assessment
CCTV, NVR and DVR footage
Proprietary recorder formats parsed directly from the disk. Priced on recorder type, number of disks and the time window needed.
Nothing is charged until you have seen a fixed quote for your actual device and agreed to it, and the assessment that produces it is free.
Other faults on a CCTV recorder
Detected but unreadable on other devices
Next step
Tell us what failed.
Free assessment. Fixed quote before recovery starts. No recovery, no fee. Sydney drop-off or Australia-wide by tracked post.