If the novel in the browser couldn't be found in the file management, it might be because the browser saved the novel in the installation folder of the browser by default instead of in the file management. You can try searching for the novel name in the installation folder of the browser or try checking the file manager of the browser to see if there are any related novel files. If he still couldn't find it, he could try to check if there were any related novel files on other computers or devices.