In the past, if you wanted multiple windows open in File explorer, you ended up with a bunch of incidents of the program open on your PC.
Now, thanks to the Tabs feature, it’s much easier to switch between folders and libraries. In File Explorer, click the + icon next to your open tab at the top.
When the new window opens, select the folder you wish to view in the pane on the left side.
Switch between folders and libraries by clicking the tabs.