You will need to contact the seller for a firmware flash file ( .bin file) to reinstall via USB.
Enter a password containing 8–16 characters. Use a mix of uppercase letters, lowercase letters, and numbers. Dvr-208g-f1 Default Password
The default password for the (often sold under brands like ZOSI , Hiseeu , or other OEM security camera systems) is typically: You will need to contact the seller for