You have to use your home recorder to format the disc.
I don’t know the LG, but I have a Sony and it formats the disc as soon as you load it the first time ( I assune it does a fast format, not a complete one. But its not relevant to you as it completes the process in the background when you use it).
You may need to have a look to the definitions, going through the menus and to see if it is set to format in VR mode.
Also see how it deals witn “plus” and “minus” RW discs, and the one you are going to use (if the LG uses both, as I don’t know), because it can make a difference. You may have all this in the manual.