From what I understand, and I would love to get confirmation on this, is that it works like this:
The regular recordings use 70% of the formatted disk capacity (or whatever you changed the percentage settings to), and they auto-erase the oldest recording within this 70% area when the disk is full and needs to save another file into this regular area.
The locked recordings use 30% of the formatted disk capacity (or whatever you changed the percentage settings to), and they auto-erase the oldest recording within this 30% area when the disk is full and needs to save another file into this locked area.
The two areas never affect each other.
I don't have enough locked files to know for sure, but that is my impression, and again, I would love for someone to actually confirm if that is 100% accurate.
