This tutorial is divided into multiple sections, because there are multiple methods.
Cut and Paste
To move a file by cutting and pasting it, follow the following steps:
1: navigate to where the file you want to move is located.
2: right click on the file that you want to move to view its context menu.
3: click on the option "Cut." In a file manager, this option merely marks the file as cut, and doesn't modify the file until you paste it. Cutting and pasting a file in a file manager merely moves it from one folder to another.
4: navigate to the location where you want to place the file.
5: right click on an empty space in the main pane of File Explorer to display the location's context menu.
6: select the option "Paste."
Note: if you don't see the option "Paste," it's possible that you didn't cut the file, or that you're trying to paste it in a special location that isn't a folder, e.g. in This PC.
Using Keyboard Shortcuts
The keyboard shortcuts for "cut" and "paste" are Ctrl+X and Ctrl+V respectively. You can use them like this:
1: select the file that you want to move by clicking on it.
2: press Ctrl+X to cut it.
3: navigate to the target location.
4: press Ctrl+V to paste it.
Drag and Drop
To move a file by drag and dropping it, follow the following steps:
1: place your mouse cursor over the file's icon.
2: press and hold the left mouse button.
3: move your mouse toward a valid target location (see below). You'll see that the file's icon will follow your mouse cursor.
4: release the left mouse button to "drop" it there.
There are various valid "target locations" that you can use this method with.
To Another Window
If you have two windows of the File Explorer open displaying different locations, you can drag and drop a file from one window to another.
To the Desktop
You can drag and drop a file to the desktop to place it on the desktop's folder.
To Inside a Folder
You can drag and drop a file onto a folder icon to send it to inside that folder.
To a Minimized Window
If the File Explorer window is minimized to the taskbar, you can drag a file over its icon to restore the window, then drop it in the main pane.
To Another Tab
If you have multiple tabs open, you can drag a file over the tab to make it active, then drop it in the main pane.