By restoring the factory settings, the router will clear all user profiles and restore the factory settings.
If the router has a USB interface, you can follow below steps to restore the factory settings by a USB drive.
1) Prepare a USB flash drive and format the USB flash drive into the fat format. Then put an empty file named reset_factory.txt in the root directory of the USB flash drive.
2) When the router is in the running status, insert the USB flash drive, and after 1 minute, unplug the USB flash drive to restore the factory state. After the factory is restored, the router will restart automatically.
If the system itself crashes, it cannot be restored from the factory via the USB flash drive.