You have California source income in the form of rental income from real estate located in that state. As a result, you will have to file a California income tax return, in all likelihood.
See https://www.ftb.ca.gov/file/personal/residency-status/part-year-and-nonresident.html#Do-I-need-to-fi...
However, as a nonresident, you will only be subject to California income tax on the amount of your California source (rental) income and not the income from your job in South Carolina.
