Field-tested guides on recovering deleted footage, reading the proprietary filesystems DVRs use and handling video evidence so it holds up. Written by the team that builds the software.
When a DVR deletes a clip it does not wipe it, it marks the space free and keeps recording. This guide walks through what that means for recovery, how long you really have and why acting fast decides whether the footage comes back.
Read the guideA step-by-step walkthrough for pulling the drive, reading it read only and rebuilding the footage a Hikvision recorder has dropped from its index.
Dahua stores video in its own DHFS filesystem, so the drive looks blank on a PC. Here is the read-only way to rebuild deleted clips, plus why a raw .dav file will not play. Covers Amcrest and Lorex too.
Footage gone from a Lorex recorder, or the screen showing No Disk after a power flicker? What the Lorex errors mean, which models it affects and the safe read-only steps to get your video back.
Swann tells people lost footage cannot be recovered. That is not the full story. What No HDD Detected and a red square mean, plus the safe read-only steps to get Swann video back.
Amcrest showing NO DISK? On these units it is often a power fault, not a dead drive. What to check first, which models it affects and the safe steps to recover your footage.
Once new video is physically written over the old sectors it is gone, for every tool. Here is why, how to tell if it has happened yet and what to do the moment you realise footage matters.
Got the footage back but it will not open, plays as a black screen or shows 0 KB? Why recovered DVR video breaks, how to open a .dav file and how to end up with a clean, playable MP4.
A forgotten DVR password locks the menu, not the footage. Reset the password without wiping recordings, or read the hard drive directly to skip the login.
Locked out of a Lorex DVR? Reset the password with security questions, the Lorex app or a factory reset, plus how to reach your footage on the drive without the password at all.
Forgot your Swann password? Reset it with the MAC recovery code or the Swann Security app without wiping footage. Default Swann passwords and the factory reset explained.
Forgot your Night Owl password? Reset it with the Password Tool secure code or the Night Owl Protect app, no email needed. Default password and factory reset explained.
Most DVRs keep footage for two to four weeks. What sets your own retention window, how to work it out and how to save clips before the loop records over them.
Yes, and it happens by design. Why recorders overwrite old video on a loop, what can wipe a clip sooner than expected and how to protect footage before it is gone.
The standard way to get a clip off your recorder for police, insurers or your own records. The FAT32 rule, MP4 vs original format and how to keep it court-ready.
DVRs and NVRs record video differently, but recovery works the same for both. A clear breakdown of each, with the recovery angle most guides leave out.
Plug a DVR drive into Windows and it shows empty, RAW or asks to format. The footage is still there. Here is why Windows cannot read it and how to open it safely.
Often yes, until the DVR records over it. How police and forensic units recover deleted footage, what decides whether it works and how to preserve it as evidence.
We are writing these from real recovery cases. Have a DVR drive that Windows cannot open? Our team can help while you wait for the guide.