Where the function is intended for
A recorder with a disk can still contain empty hours when channel, schedule, detection and recording action do not match.
A recording schedule is part of the purpose of a camera: overview, evidence, report or a specific zone can require different settings.

A recorder with a disk can still contain empty hours when channel, schedule, detection and recording action do not match.
Check per channel which moments should be continuously recorded and which only during an event. Also check whether the camera itself or the recorder records the event.
Create a schedule that fits the risk and the desired storage period. Use names and channels that clearly indicate which camera belongs to which room.
Test an event at a scheduled time and then search live, event, and recording in the timeline. Check a second day to see if the schedule continues.
It provides more comprehensive coverage, but requires more storage; the choice depends on the situation.
Usually yes, provided you set that consciously through the channel.