Start in the Files tab in the Navigation panel on the left-hand side of the screen.
The newly created folder will be placed as a subfolder of the currently selected folder.
The Filter panel, with another search icon (directly above the file listings) acts in a very similar manner to the search function. Using this filter option will only search within the folder currently selected however, whereas the Search panel at the top of the page will search through all folders on the CMS (unless the Limit to current folder? option is checked).
Navigate to the file to be edited or moved.