 Once created, the index is continually updated by the application; in the case of NTFS the updates are fetched from the NTFS change journal.Specific folders on any file system can also be added to the index, but the indexing of folders not using NTFS or ReFS will be slow, although searching using the completed index will not be.Regardless of the file system used on the indexed drives and folders, Everything searches its index for file names matching a user search expression, which may be a fragment of the target file name or a regular expression, displaying intermediate and immediate results as the search term is entered.