All you need to do is to follow this solution
CCTV data recovery
The data recovery software is easy to use. You can recover deleted photos, videos, and other files from CCTV webcam, video camera, and other camcorders.
Take note that you'd better stop using CCTV camera to prevent new videos to be recorded. Because new videos could overwrite the space of deleted videos/photos which may make them not recoverable.
Here's the step by step guide you can follow
Step 1. Take out memory card from your cctv camera.
Step 2. Connect memory card to computer with a card reader
Step 3. In data recovery software, select memory card, and then choose Next to scan for lost files.
Step 4. After scanning completed, you can see list of recoverable files in result page. Select files you want to recover, and then press Recover to save them.
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