QNAP Security NVR-101 (Version: 2.8.0) - Manual (Page 70)

delete recording data after 7 calendar days, on the 8th day, files recorded on
the first day of each camera will be deleted so that NVR can start to save data
of the 8th day.
z Pre/Post Alarm Recordings
„ Start recording video…second(s) before the event occurs: Enter
the number of seconds to start recording before an event occurs.
„ Stop video recording…second(s) after the event ends: Enter the
number of seconds to stop recording after an event ends.
The maximum number of seconds for the above settings is 300, i.e. 5 minutes.
Note: All the settings will not take effect until you click the Apply button. When
applying changes, recording operation will stop for a while (maximum 1 minute) and
then restart.
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