Missed video

How can I extend the recording time I have a doorbell v4 and I am finding it’s missing people dressed in dark clothes coming into my drive the first I see of them is they are standing right at my door or even they can come into the drive and drop a parcel off in a storage box and they don’t even appear on the camera. Last week I had a courier stop at the bottom of my drive and get out climb in the back off the van and that’s all I had recorded yet he climbed out and came into my drive and dropped a parcel into the storage box and left but none of the second part of his visit was recorded Why is this ? Do I have something set up incorrectly or does ring not record everything?