1. A method comprising: in response to a determining, by a computing device, that an application has performed a file operation on a file, storing, by the computing device, an association between an application identifier of the application and a file identifier of the file, wherein the file identifier of the file uniquely identifies the file; determining, by the computing device, whether an execution behavior of the application changes when the file is inaccessible to the application, wherein the execution behavior of the application changes at least when the application provides one or more of a notification, a warning, and an error; and in response to a determining, by the computing device, that an execution behavior of the application does not change when the file is inaccessible to the application, associating a status indicator with the file identifier of the file to indicate that the execution behavior of the application does not change if the file is deleted.