Spotting

It certainly looks like a widow spider, which species, I"m not sure.
Clemson University reports the following.
"The Southern black widow is found throughout South Carolina. It is easily identifiable by the shiny, black, bulbous body with the abdomen bearing a red “hourglass” marking on its under surface. In some specimens, there are additional red spots on the top surface of the abdomen. The Southern black widow usually is found outdoors under stones, logs, or other dark, protected areas in and around buildings. The Northern black widow is found in the mountains and the Piedmont of South Carolina. The Northern black widow looks similar to the Southern black widow, however, it lacks the “hourglass” marking on their underside having, instead, two red spots.

The brown widow is a widespread species found in the tropical areas. In the United States it was introduced into Florida and is now found throughout the state. The brown widow’s range has been expanding northward and it has recently become established in parts of South Carolina. In the late 1990’s, it had been reported in Charleston and Beaufort, although infrequently. Since the summer of 2002, more reports of their presence have been made in numerous areas of South Carolina"

Take a look again at the markings on the spider for you to be sure.
https://greennature.com/spiders/