Surveillance video can only be saved for 3 days, more than the automatic deletion, I am in urgent need to drop the use of 3 days before the days of video, please ask can be recovered, how to recover, kowtow thank you! Generally, the maximum amount of data on a dedicated surveillance server is based on the size of the hard disk

Generally, 5% to 10% will be retained

When the space is insufficient, the software will delete the old data and write new data

These data are generally overwritten with previous data

So, it is very difficult to recover them.

If it is particularly important, it is recommended to find a specialized data recovery company to do it!