What you'll notice
Playback stutters, blocks of grey artefacts, files that refuse to export or open.
Why it happens
A dying drive, power cuts mid-write without a UPS, or firmware faults in the recorder.
How we fix it
Drive health testing first — corruption is usually the drive's early warning. We repair the cause, then fix the export workflow so evidence copies play anywhere.
Still not working?
If the checks above haven't restored your surveillance hard drive, this usually needs a technician. Our CCTV Hard Drive Replacement service covers exactly this fault.