What does quick access do?

The new Quick Access is similar in principle to the old Favorites section — it’s a place where you can pin your favorite files for, well, “quick access” — just with a few added features, namely an automatically populated list of recently-accessed files and frequently-accessed folders.

How do I open quick access in Windows 10?

In File Explorer, click on the View tab at the top to display the View ribbon. From there, click on the Options button. In the Folder Options window under the General tab, you’ll see that the option for “Open File Explorer to:” reads Quick access. Simply click on the entry for Quick access and change it to This PC.