Windows 10 allows you to customize where File Explorer opens and what happens to folders when you click on them.
Here’s how it’s done. Start by clicking on the icon for File Explorer.

Click the View tab.

At the far right, click on Options.

The Folder Options menu will open.

Let’s start by clicking on the General tab.

Your first decision is to pick what File Explorer displays on opening.

You can pick between Quick access and This PC.

Quick access will display frequently and recently used files.

This PC will display all folders and files on your PC.

Your next option is to decide if you want folders to open in the same window or a new window.

If you open files in the same window, the files displayed in the center pane will change when you click on a different folder.

If you choose Open each folder in its own window, another window will open. Having a second window can be helpful if you want to drag and drop files between folders.

You can also choose whether you want files to open with a single or a double-click.

Finally, you can control which files display in the Quick access menu.

If you’d prefer a less-cluttered look or are concerned that someone else might be able to learn too much about your activity, you can either just uncheck or just choose to clear the history.

Clicking Restore Defaults will undo any changes you’ve made.