Very few wills and probate records are online.
In order to find a will and probate records, you need to know the county that the person died in. I looked up Broxtons Bridge Plantation which a web site was located in Ehrhardt, Bamberg Co. SC.
You won't find his will in that county because it wasn't created until Feb 25, 1897.
Where was he living when he died in 1860?