HIKVISION NVST HNR Series User Manual page 97

(Optional) You can click Copy to if you want to copy the quota settings of the current camera
to other cameras.
Click Apply.
When the quota capacity is set to 0, all cameras will use the total capacity of HDD for record and
picture capture.
Reboot the device to activate the new storage mode settings.
Network Video Recorder User Manual
Storage Mode-HDD Quota
96