It is always best practice to stay ontop of your email inbox. Below are a few options to help you:
Select the item you want to move.
Drag to the destination folder, and then release the mouse button.
Note: If the folder you want to move the message to does not appear because it is in a collapsed folder, hover the mouse pointer over the collapsed folder icon and the subfolders will appear. Repeat this as necessary until the folder you want appears.
Select the item you want to copy.
On the Edit menu, click Copy to Folder.
In the Copy Items box, click the folder where you want a copy of the message saved, and then click OK.
Note: If you want to create a new folder, in the Copy Items dialog box click New.
Select the item you want to move.
On the Edit menu, click Move to Folder.
In the Move Items box, click the destination folder, then click OK.
Select the item you want to move or copy.
To move, right-click and select Cut. To copy, right-click and select Copy.
Alternatively, you can use the keyboard shortcut.
To copy the item: click Ctrl+C.
To move the item: click Ctrl+X
Navigate to the folder where you want to move or copy the item to, and then click Ctrl+V.