Open the folder option and click the Tools menu on the window. Then select the folder option from the drop-down menu. 2.

switch to view tab, and in the folder options dialog box, click view to switch to view tab.

change the settings for displaying the extension, and display the extension. In the advanced settings section, change the selected extension for hiding known file types to uncheck, and click OK.

after passing the above settings? This way, no matter what file it is, it will show the extension, that is, the file has a suffix.