A: Since the user uploaded copyrighted material to your website without your knowledge, generally you will not be automatically liable under the DMCA “safe harbor” provision. As you have already removed the content, make sure that your site has a published DMCA policy and that you have registered your designated agent with the U.S. Copyright Office. Generally, if you have everything in place, most of these matters are resolved without ongoing liability.
Feel free to reach out if you need guidance on setting up a policy and agent registration.