1. A file search method executed in a file search apparatus for searching for a file relevant to an application, the file search apparatus having an interface, a processor coupled to the interface, and a memory coupled to the processor, the file search method comprising the steps of: obtaining process information which includes an execution start time and file path of the application; identifying, from the obtained file path, a directory that serves as a start point in a search for a file relevant to the application; and searching, with the identified directory as the start point, for a file accessed after the execution start time of the application.