QNAP Security VioStor NVR (Version: 4.1.2) - Manual (Page 171)

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Note:
Starting and stopping manual recording will not affect scheduled or alarm recording
tasks. They are independent processes.
All the settings will not take effect until ‘Apply’ is clicked. When applying the changes,
recording will stop for a while (maximum 1 minute) and then restart.
The settings of the snapshot folder are global settings which will be applied to all the
channels.