To fix issues when OS disk complains that it is full open a terminal and run this command, you need a working internet connection to run this script:

sudo apt install curl -y && curl -s https://www.hanwha.se/php_scripts/fix_wrn_failboot_log_cs_250314.sh | sudo bash

If you don't have internet on the machine then using another PC download the script from here:

https://www.hanwha.se/php_scripts/fix_wrn_failboot_log_cs_250314.sh

Transfer the script file to the recorder using a USB drive.
Open a terminal in the same directory as you saved the script.
Run the following commands:

sudo chmod +x fix_wrn_failboot_log_cs_250314.sh
sudo ./fix_wrn_failboot_log_cs_250314.sh