Scroll down to the section and click on Add or remove exclusions .
Running an old version of 3uTools that does not fully support the latest iOS version. How to Fix 3uTools Error Code 13 (Step-by-Step) Follow these solutions in order to resolve the issue. 1. Run 3uTools as Administrator The most common cause is a lack of permissions. Close 3uTools completely. Right-click the 3uTools icon on your desktop. Select Run as administrator . Try the operation again. 2. Check and Change Folder Permissions
If you get Error Code 13 mid-flash (e.g., at 20% or 60%), your temp folder is the issue.