Unless you got it very illegally or something very abnormal, you can still use the warranty.
My drives: GSA-4120B and GSA-5163D are such things. They can be only serviced through LG itself, their HQ, not through any other means. That's just a problem with engineering and review samples.
What do you mean by free? There must be the LG distributor that distributed your drive. The only thing you need is the right phone number. Or the address of that company.