Document Damage Immediately
Before you call anyone, document everything. Photos and video are the single most valuable evidence you will produce during the entire claim. Walk the perimeter of your home with a phone camera. Capture every side of the roof from ground level (never climb a damaged roof). Shoot interior ceiling stains, displaced gutters, torn soffit, and any debris from the storm. Every phone photo is date-stamped in the metadata — that timestamp alone can defeat an insurer's argument that damage was pre-existing.
Pull the storm report from the NOAA Storm Prediction Center or the NWS Charleston forecast office for your loss date. For hurricane damage, screenshot the National Hurricane Center advisory showing the storm name, wind speed, and track — this establishes the event for your named storm deductible.