Smartwatch H20SWDVR4R Operation Manual page 68

SmartWatch DVR Operation Manual
If there is only one HDD and it is set to Read-only, the device won't be able to record any files. Only
live view mode will be available.
If you set the HDD to Read-only when the device is writing files to it, the file will be saved in the next
availableR/W HDD. If there is only one HDD, the recording will be stopped.
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