I would also add that the current firmware does not support NTFS hard drives larger than 2TB. That seems quite possible to be that the system that does not support hard drives with the "new" GPT format than 2TB is greater for hard drives with capacities necessary.
However, it should be easy for LG to fix it because my LG TV (Smart TV also) my 3TB and 4TB HDD unconditionally recognizes the home theater system does not.