I live in NC, my brother and I signed an affidavit that our mother left no will when she past. It's been 8 years he pops up with an unsigned will

If a court had admitted the Will to probate (proving) and appointed your brother executor, it would be his duty to gather the assets, pay the bills and distribute the rest in accordance with the Will.  Given the time that has passed, he would probably only be able to file a distribution deed distributing the property according to the Will.  BUT it is highly unlikely that a court would admit a unsigned Will to probate.  Hire a local probate lawyer to file an application to determine heirship and issue letters of administration and settle your mother's estate.  If both your parents have died and you and your brother are the only children, half the home is yours.