Here are some websites for research in South Carolina.
South Carolina Department of Archives and History
This is the website for the South Carolina Department of Archives and History. It is similar to the other state archives that I have mentioned previously. They offer research services so that you could have them look at a book or manuscript that you can’t find anywhere else. There is no fee to use the site.
South Carolina GenWeb Project
This is the USGenWeb site for South Carolina. It has many of the same features as other state sites within USGenWeb. The page where you select the county of choice gives a brief background on which district the county was formed from which is very useful when needing to search the earliest records of the state. There is no fee to use the site.