Info on link to delete a file, is incomplete, hence I need help doing so

On this link: httpt s:// It is supposed to tell you how to delete a file. I laughed when I read this because one has no clue as to where one has to be in order to do so. The image of the ex. shows, "Online Storage’’ but it is supposed to tell you also if the back up is not online, which mine isn’t. The little ‘x’, which one is supposed to click on to delete something is non-existant anywhere else. So how does one delete a file within a ‘.cbu’?
BTW, should it matter, my OS (win 7) was recently installed so the "Manage’’ or anywhere else does not have my cbu, IN order to access it I must go to my backup drive and double-click on it.