For those who frequently search for specific content stored on their PC, the search index automatically created by Windows 10 is useful. In the default settings, this feature only takes Windows Libraries and Desktop into account, but you can add additional user-created folders.
To do this, open the Windows Desktop, for example, by first clicking the Start button and then the gear icon. Select Search, and then on the left, Search in Windows. In the main window, if Classic is selected under Find My Files, click the Customize search locations here link.
Starting from the Modify / Show all locations buttons, add additional directories to the indexed locations, selecting all the desired folders in the top area, and click OK at the end.
It is worth waiting a few minutes (up to tens of minutes for a large hard disk) for the index to build before performing the first search.