QNAP Security VioStor NVR (Version: 3.5.1) - Manual (Page 208)

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6.6.5 Advanced Settings
Configure the advanced recording settings in this section.

Maximum period for each recording file: Specify the maximum length of each recording
file (maximum 15 min).

When the available storage is less than…GB: Specify if the NVR should overwrite the
oldest recordings or stop recording when the available storage capacity is less than the
specified size.

Keep alarm recordings for at least…day(s): Specify the number of days that alarm
recordings will be retained.

Remove recordings after…day(s): Enter the number of calendar days for the NVR to
keep the recording files.
Please make sure the storage capacity is enough to save the data for the number of
calendar days specified. When the recording data has reached the expiry date, all the
expired video files will be deleted. For example, if the NVR is configured to delete the
recording data after 7 calendar days, on the 8th day, the files recorded on the first day
of each camera will be deleted so that the NVR can start to save the data on the 8th day.