I will suggest to use the Viewer to configure the unit.
There is a button on top to open the configuration screen that later will be saved on SD card. I'm using config utility ver. 1.7.3.0
In "Basic" tab check that "Recording Mode" is set to "Always+Event". If you don't want events to be stored in separate folder you may disable "G-Sensor" on the same tab or make it less sensitive. On our roads with the lowest settings I'm still getting few event files
In "Additional" tab you may specify how much space on SD will be used for different file types, like events or when device detects the motion (in parking mode). Be aware that SD card reformat will be required after you will make any changes
In "Audio" tab, at least for the start, I will suggest to turn on "Voice Guidance" and "English" (if you don't want to listen in Korean). As soon as you will start the car (assuming you are not using parking mode), the unit will inform you that it is ready or in case of issues will inform about problems, like SD card cannot be read.
After that either click save or format. I have issues on my desktop, when config utility does not recognize my SD card. But on laptop after initial reformat (I used new card and left the SD that came with the unit with the viewer and docs alone), I found 3 folders plus "config.bin" file. After that I put the SD into the unit and I don't have any issues...
There are no means to change the default recording times. For "Always" this is 3 minutes, for events it is 30 secs. I didn't try parking mode (yet) and don't know the length of "Motion" files
Regards
EDIT: Motion detection files are also 30 seconds. It takes some time to switch from parking to driving mode. In my case it was about these 30 secs
The unit also reported with voice that it switched to driving mode.