What is this icon appearing on my desktop icons?

I have noticed that a few of the desktop icons have an "overlay icon" that looks like 2 blue arrows pointing toward each other in the top right hand corner of the icon.

There is no relation between the programs that have this icon, except perhaps that they are using a network connection to databases (MySQL and MSSQL). I am using Windows 10 Home.

This overlayed icon is to show that the files have been compressed. Right click an icon, go to Advanced Attributes and uncheck the Compress contents to save disk space box.

If the files are not compressed but still show the icon then it is probably a glitch.

You can read about a similar issue here that solves the question: http://www.tenforums.com/customization/26212-new-double-blue-arrows-shortcut-overlay-2.html