What Is Quick Access?
Quick access is a new feature that is first introduced in Windows 10.
It is similar to the old Favorites section in the old Windows versions.

it’s possible for you to find it after accessing File Explorer.
you’re able to pin your favorite folders to Windows 10 Quick access.
The recently-accessed files and frequently-accessed folders can also be shown in Windows 10 Quick access.

Now, we will show you how to use Windows 10 Quick access.
How to Add a Folder to Quick Access?
It is very easy to add a folder to Windows 10 Quick access.

you oughta use steps:
The selected folder will be added to Quick access.
How to Remove a Folder from Quick Access?
Here is a step-by-step guide:
Then, the folder is removed from Quick access.

But, it is not the mode that you cant change.
you’ve got the option to also set your rig to open File Explorer to This PC.
Sometimes, you may find that the Windows 10 Quick access is busted.