Create a folder
Folders provide a way to organize email messages, contacts, and tasks in Outlook. To add a folder to the Navigation Pane, do the following:
On the Folder tab, in the New group, click New Folder.
Note When in the Calendar view, the New Folder command is replaced with New Calendar.
In the Name box, enter a name for the folder.
In the Select where to place the folder list, click the location for the new folder. The new folder will become a sub folder of the folder you select.